Malicious PDF — malware analysis report

Static analysis result for SHA-256 388f2c1b5710f4e8…

MALICIOUS

PDF

82.5 KB Created: 2021-03-16 07:25:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9bc1ff621047f8bfd7cd598af5b8c71c SHA-1: 9fe73ed8cce922bd822d260e4640830d595fcb98 SHA-256: 388f2c1b5710f4e8e171e9c1707e9d66b595dad811c264878b77fd22c07df498
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://golowaki.ru/wix?keyword=quickoffice+pro+apk+latest+version PDF link annotation
    • https://cdn.sqhk.co/vupapevixu/bjcnidr/cfo_job_description_samples.pdfIn PDF document text
    • https://cdn.sqhk.co/dubikureta/GhaPcgc/waduwukifa.pdfIn PDF document text
    • http://lavorunolutoga.22web.org/date_format_iso_8601_bash.pdfIn PDF document text
    • https://legovizadedugid.weebly.com/uploads/1/3/1/8/131856283/ferakuvegoz_nusitezati.pdfIn PDF document text
    • https://jipuzalo.weebly.com/uploads/1/3/4/6/134693454/batijaj.pdfIn PDF document text
    • http://tokigarodam.22web.org/3639127887.pdfIn PDF document text
    • https://vominitaxa.weebly.com/uploads/1/3/4/6/134677623/4ca6590cb7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xiwilamudebi.rf.gd/pezurowunedufapolufotam.pdfIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_ec2410fdd80e4706a0b31950eed39fc4.pdf?index=trueIn PDF document text
    • http://jilovin.epizy.com/burnaware_free_windows_7_64_bit.pdfIn PDF document text
    • https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_2493e94dc6234a59becadbf029601487.pdf?index=trueIn PDF document text
    • http://jimabepur.rf.gd/adobe_illustrator_cs6_free_for_pc.pdfIn PDF document text
    • https://88966db1-4a83-4446-b941-f65022a6235f.filesusr.com/ugd/928e0f_e6c8f5e527cc4c8ea2a231a953925c7d.pdf?index=trueIn PDF document text
    • http://nigiragesowujow.epizy.com/smartest_guy_in_the_room_full_movie.pdfIn PDF document text
    • http://tukuponuvul.epizy.com/dolphin_emulator_for_pc_windows_10.pdfIn PDF document text
    • http://sosozodazu.epizy.com/how_to_use_multimeter_digital.pdfIn PDF document text
    • http://wunitawuzufif.epizy.com/hand_anatomy_bones.pdfIn PDF document text
    • http://wobemiko.epizy.com/game_bengali_movie_song_320kbps.pdfIn PDF document text
    • http://vazegazu.epizy.com/bogimen.pdfIn PDF document text
    • http://xevupabiko.rf.gd/99665333176.pdfIn PDF document text
    • http://pamubaj.epizy.com/tukaxuvokevarelulexibaziw.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10428 5192 bytes
SHA-256: 7343719ac3f39cfff966906d88823da9ef3a62006ad65044dc62c40b80c3fb9b
font_01_sfnt_off000115f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F4 11424 bytes
SHA-256: b9eb98181449ef9964794d414e8c3ef2f095102a95c327bc966afe075452f302

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