Malicious PDF — malware analysis report

Static analysis result for SHA-256 882dc4120e7708b5…

MALICIOUS

PDF

74.6 KB Created: 2021-05-17 07:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 449c1fb68c6657c765e956208900b0f6 SHA-1: 9ea9a794a6254cfc204571c555c72852f46cecfd SHA-256: 882dc4120e7708b5ef84612bc4b9cc72fbac2efc6df8e90adfcbf45aeb96e6aa
186 Risk Score

Malware Insights

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

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 0.9998

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://jaragamonobuwuf.weebly.com/uploads/1/3/5/3/135346236/1840145.pdf In PDF document text
    • http://fineagencyy.com/are_the_jlab_go_air_waterproof96iy1.pdfIn PDF document text
    • https://cdn.sqhk.co/fitodofafe/iivxhco/joker_song_ringtone_mp3_download_lai_lai.pdfIn PDF document text
    • http://copyright-securityx.com/android_screenshot_app_apkaekpj.pdfIn PDF document text
    • http://remont-kholodilnikov.website/338754645545hrbs.pdfIn PDF document text
    • https://dejoputaxili.weebly.com/uploads/1/3/4/7/134763817/1308356.pdfIn PDF document text
    • https://didunomupipopad.weebly.com/uploads/1/3/1/4/131438203/nakugo.pdfIn PDF document text
    • https://cdn.sqhk.co/furafurume/jNrZhfm/sudofitenat.pdfIn PDF document text
    • https://junezafebu.weebly.com/uploads/1/3/0/8/130874287/lanatediluzod.pdfIn PDF document text
    • https://wanagewuzedu.weebly.com/uploads/1/3/1/3/131383352/2be6d7b.pdfIn PDF document text
    • https://cdn.sqhk.co/xoraxuvonaf/Qjdnkr6/bhumika_movie_song.pdfIn PDF document text
    • https://srscctek.com/myfaq/content/6/99/en/how-to-reset-a-my-cloud-sinIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/bVCGPfG74RQ/wb?keyword=wd%20my%20cloud%20login%20default%20passwordPDF link annotation
    • https://uploads.strikinglycdn.com/files/98645781-689e-40f9-8815-3a7a43d868ff/feturesikururamezexixunar.pdfIn PDF document text
    • https://8137cd1e-393d-4948-8193-eca935452849.filesusr.com/ugd/756799_d7eae116be8446fd8a5863d9c80fdf8c.pdf?index=trueIn PDF document text
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_a12410cdbef54c76ab0824f3ab432798.pdf?index=trueIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_077d472c5d88442591c05299a25c863c.pdf?index=trueIn PDF document text
    • https://484a0fbd-04e0-416f-b335-41eb3f66808b.filesusr.com/ugd/228afb_df2d1fad62d44fb289617c48cbd9cfbc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/da49946f-7b2e-445c-9501-b6a62b4f0441/kuwonavawovawopasulof.pdfIn PDF document text
    • https://a2876ee3-c470-454a-91e2-e108d831033a.filesusr.com/ugd/e8dba5_bfa89da868c64a889a6ee472f00f723d.pdf?index=trueIn PDF document text
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_dab0239639fb479f86f3af88b9018681.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EF 5684 bytes
SHA-256: 279ff773930743c4b6de24ca9aa7e901ad22a4849801aea9ef058ba6eb69d264
font_01_sfnt_off0000f65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65C 11468 bytes
SHA-256: 7f6ab9216dcdc20848cfb467753d1a58532d6c08899edff25aa52b64b4ea6944