Malicious PDF — malware analysis report

Static analysis result for SHA-256 19a2faf3bbf9ea72…

MALICIOUS

PDF

97.0 KB Created: 2021-03-29 22:23:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0a1d296c7d78c982bd39fd21305e303f SHA-1: c3955848f70841e6d792f953022622afb643c81e SHA-256: 19a2faf3bbf9ea72e81ab211e459130b15de882b6c8b3ed82d2e03e98381dc3f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as a link farm, containing numerous external URLs pointing to potentially malicious content. The ML classifier and ClamAV also identified it as malicious. While no scripts were extracted, the structure and embedded URLs strongly suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jumiwimov.ru/wix?keyword=nova+poisoned+water+worksheet+answers+quizlet PDF link annotation
    • http://confirmationhelpcenter.com/the_odyssey_part_2_the_return_of_odysseus_study_guide_answersvlsce.pdfIn PDF document text
    • http://matroskin.space/76971020056fl1qd.pdfIn PDF document text
    • https://kafiwixuvaso.weebly.com/uploads/1/3/0/8/130874495/fofotozimipu.pdfIn PDF document text
    • https://xetutimi.weebly.com/uploads/1/3/0/9/130968997/2542747.pdfIn PDF document text
    • https://ritukananikunid.weebly.com/uploads/1/3/0/9/130969552/06c31c4b04cc9ac.pdfIn PDF document text
    • http://istlan.fun/best_video_player_for_windows_10_pro92epv.pdfIn PDF document text
    • http://instapodarok.site/how_to_use_infrared_heaters_getgdgp3.pdfIn PDF document text
    • https://cdn.sqhk.co/mumaxeje/3idOsG1/sisters_grimm_movie_cast.pdfIn PDF document text
    • https://tofavasexivefet.weebly.com/uploads/1/3/4/5/134578877/gebuxi.pdfIn PDF document text
    • https://cdn.sqhk.co/laloropaki/a0gfCdI/jitufopa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/belapawerezuju/97248640484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7348035c-35d8-44f5-b47a-675eb34b0e01/jalojelufefiwemudesib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c14b652-0a37-47df-8688-1954897ebb2f/dejixojarewuvewabude.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/all_in_one_toolbox_pro_apk_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96c5a3d0-bfa4-482e-9631-9ada9d830c2f/how_do_i_get_my_nespresso_vertuoline_out_of_descaling_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c38e52e7-be1b-4b68-adac-392e38d73bec/quadrilaterals_and_coordinate_geometry_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c77dc05e-ebcb-4e2a-a4c0-01e0acf44e23/dead_suns_map_pack.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/31637764238.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/magpul_moe_grip_pistol_grip_for_ar-15__mag415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac3a5c18-42f8-435a-8e6a-a7e4885c5530/61310074073.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/jelefukirarogukavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eb9a200-d91a-43af-9147-386b5c4534ce/mvc_interview_questions_and_answers_for_experienced.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20dfbc94-3ab5-475b-b62b-215394a53296/shadowrun_5e_2050s.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF09 7044 bytes
SHA-256: 1a5bd0f609c1549fe94e1c3bcddf9708c219291ddc22fd7457d8cf08fba33b0d
font_01_sfnt_off000100f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F3 3048 bytes
SHA-256: 8f34c3bba18e41b779df67f746294a1f5999743f3d96e1d882979db606d55ca0
font_02_sfnt_off00010bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC7 5288 bytes
SHA-256: f3019e1166b3afa489396e007c4415a33dcbebf839f512fc7c0c9a291ec4cbd9
font_03_sfnt_off00011dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC7 1648 bytes
SHA-256: 8170fc3fc409a1c0877eb8fc97c1aa6793fdaed6054e537339186737bbbebbfb
font_04_sfnt_off0001260a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1260A 11068 bytes
SHA-256: 80bedb43688d6f1f3510da3d8132fbcb296449adea7256742115d205268eb975
font_05_sfnt_off00014c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C3D 18180 bytes
SHA-256: 870f18dd7d9413691770486522c945bb0170f39fb2ff2382c6b24f1e528de41e
font_06_sfnt_off00016641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16641 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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