Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2efd5ef0a0cb702…

MALICIOUS

PDF

92.6 KB Created: 2021-03-08 02:20:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: fe8f5cfec1374e575f77b95cbf000b8e SHA-1: a9c13d2e79e7c13d975e9b24161a64015232dfa4 SHA-256: f2efd5ef0a0cb7021d494c4d093a5f183a044cd9d95d533d37fc0832580a4a02
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs point to suspicious domains, further supporting the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://baarspo.ru/wix?keyword=summoners+war+rune+leveling+guide PDF link annotation
    • https://cdn.sqhk.co/winelolibug/bMhjheG/out_of_the_loop_game_freaks.pdfIn PDF document text
    • https://retotanenumu.weebly.com/uploads/1/3/4/0/134017544/bewuluxopadono_suzirobawilari.pdfIn PDF document text
    • http://ijmalan.xyz/582278391905kp68.pdfIn PDF document text
    • https://duxosefexi.weebly.com/uploads/1/3/4/6/134605181/7fa900ac24587.pdfIn PDF document text
    • http://storeplus.info/now_and_then_movie_netflix_australiacjjc0.pdfIn PDF document text
    • http://rineset.xyz/roguelands_inventory_editor41s4p.pdfIn PDF document text
    • http://zabavnyi-slon.ru/dubelarabiguzatotah169k.pdfIn PDF document text
    • http://itchia.space/polarisation_index_test_of_transformer6mdix.pdfIn PDF document text
    • https://cdn.sqhk.co/xupixawina/4jcYNhg/mr_love_queen_s_choice_walkthrough_victor.pdfIn PDF document text
    • http://yogait.space/zofosaxiniracavry.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/download_pmbok_6th_edition_indonesia1sp3j.pdfIn PDF document text
    • https://cdn.sqhk.co/wukufazujuv/Sgehihj/horse_racing_videos_free_download.pdfIn PDF document text
    • https://dekitinuro.weebly.com/uploads/1/3/4/8/134871397/2470874.pdfIn PDF document text
    • https://nawenakugod.weebly.com/uploads/1/3/6/0/136048640/8124522.pdfIn PDF document text
    • https://surupipenip.weebly.com/uploads/1/3/1/8/131856971/jolik_noroworogetox_bozemopulo_zivisaviporaxut.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://uploads.strikinglycdn.com/files/9fc35078-9943-47aa-ac50-8855ad64acba/what_is_the_purpose_of_narrative_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d5404ee-4c7d-4a48-9f0e-4be95d29aac8/how_do_you_use_a_tennis_ball_for_plantar_fasciitis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52656ea3-3052-4517-b0d4-4e5a062b72a7/18403181320.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2795bbd9-d1c1-4b26-af9d-b077d41287d0/how_is_the_smoke_drawn_up_a_chimney_affected_when_a_wind_is_blowing_outside.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9de4852f-5e59-4a00-9b1c-069374dabfcc/siribixujelutoxoseramof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06df64a3-50aa-44fd-8bb8-a8062c1b3356/82006796738.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
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF4 2880 bytes
SHA-256: aff11289bf87f92bc53c0e2abc335208e29b6db8a954e82fd0a5595ffa95d344
font_01_sfnt_off00010a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A32 5200 bytes
SHA-256: ce7509107f0243cceadbafe70dfa221fc7fe9115d596ff4bd40e4e7f45c54405
font_02_sfnt_off00011bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC4 10444 bytes
SHA-256: ee593078eb005034a3279c977a08a8594ddf6eea65bfe6213ff789986a101dc8
font_03_sfnt_off00013fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD0 16436 bytes
SHA-256: 8d54ad90552f39fb4d491b643748b8378deba2c9065aea35027a18873584a0a7
font_04_sfnt_off000155d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155D4 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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