Malicious PDF — malware analysis report

Static analysis result for SHA-256 902fa7bf3faf9a06…

MALICIOUS

PDF

80.4 KB Created: 2021-03-05 11:46:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 6d47c27dba26bb8736fd598a2e6ed292 SHA-1: 53f8347570fdc1032ef890c4466fc6a726a597df SHA-256: 902fa7bf3faf9a06de051c3e602fefc8635b53fb14b5dececf9f0e12534e90ae
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable domains or known malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, but the presence of numerous external links suggests an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=how+to+describe+a+scary+forest In PDF document text
    • http://devicesprotectionforusers.site/battletech_a_game_of_armored_combatmgmc7.pdfIn PDF document text
    • https://muruvarulem.weebly.com/uploads/1/3/1/4/131406835/06b5a0.pdfIn PDF document text
    • http://pedrons.space/safe_agile_4.5_exam_questions2m37m.pdfIn PDF document text
    • http://help-copyrightservice.xyz/bsc_csit_application_formjmoul.pdfIn PDF document text
    • http://toguvuveleguna.22web.org/kawazezunurabefe.pdfIn PDF document text
    • https://wugeneziwepuzi.weebly.com/uploads/1/3/4/4/134494794/67bb9775fc.pdfIn PDF document text
    • http://igcopyrightverify.com/whats_the_worm_in_tequila_calledqgdhw.pdfIn PDF document text
    • http://myfoxing.online/8599738380rty3j.pdfIn PDF document text
    • https://bewirawafatuli.weebly.com/uploads/1/3/4/5/134595338/xozasumul-lenokexixa-rejovujofexopok-wifukexejepose.pdfIn PDF document text
    • http://hookup666.site/wizidojeketisegosis2ghuj.pdfIn PDF document text
    • http://xanuxitawunavi.iblogger.org/the_hobbit_download_in_tamilyogi.pdfIn PDF document text
    • http://thiswaytovogue.com/beeruva_telugu_movie_songs_free64o9v.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://ee6bc897-aa08-459d-b6e6-b1b1d69fcba1.filesusr.com/ugd/7ba596_ed4bf993ef2349e7a7a418f7a5594bb5.pdf?index=trueIn PDF document text
    • http://tesaminovosino.epizy.com/honeywell_programmable_thermostat_th6110d1021_manual.pdfIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_6f50c33beed1417fac782d58ac0bd34b.pdf?index=trueIn PDF document text
    • http://bedevekozazabe.rf.gd/schwinn_ic3_indoor_cycling_bike_499.pdfIn PDF document text
    • https://b4e79a3f-0083-4b26-8056-4fe87fb46dfd.filesusr.com/ugd/332c1b_d0d8436439b34b3eb8765fb6e13c902e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/614c55f4-6572-4ab2-a136-0d0bb2c33452/get_tough_how_to_win_in_hand-to-hand_fighting.pdfIn PDF document text
    • http://derusevar.rf.gd/guidelines_for_treatment_of_hypertension_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30bb8a3e-9c46-48a4-97d8-922de83cb3e6/just_2_words_level_1586.pdfIn PDF document text
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_800774b1ebef45e384bd03553090348c.pdf?index=trueIn 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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0F 4960 bytes
SHA-256: dcd31b44ff9023c5b793548f6ff0570e405ccec8a257393538631de6c957ca07
font_01_sfnt_off00010015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10015 11020 bytes
SHA-256: 3591fdbe5426eaafeee2f6b20dd00835b23b83f9d219433f78a9a4dcacd7248f
font_02_sfnt_off000125a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A3 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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