Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9b05c5e2d372dd4…

MALICIOUS

PDF

124.8 KB Created: 2021-03-23 00:23:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9c95253f720399e1ff4328e7a754907d SHA-1: 93837e8677cb20012db1ebeb1d7e7a09b3368d2b SHA-256: a9b05c5e2d372dd466966baa002b88c38576edb90304035635ba872847c6b93a
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 0.9996

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
  • 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://vilenefex.ru/award?keyword=bombardier+inc+annual+report+2020+pdf PDF link annotation
    • http://autocredit.moscow/wapedeyg5m1.pdfIn PDF document text
    • https://cdn.sqhk.co/dojozafo/gBp2jih/rusk_deep_shine_shampoo_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/jifegusewe/jjidzgc/21279851206.pdfIn PDF document text
    • https://jurivulanikep.weebly.com/uploads/1/3/4/5/134525456/wadanin-rotov-bakid.pdfIn PDF document text
    • https://jedewudozoj.weebly.com/uploads/1/3/0/7/130739070/15474.pdfIn PDF document text
    • https://medotufise.weebly.com/uploads/1/3/4/5/134512565/jaxifibipex.pdfIn PDF document text
    • http://m-laskin.ru/wijibigopifareo1c4e.pdfIn PDF document text
    • https://dofafurubes.weebly.com/uploads/1/3/4/7/134762343/welefabuki.pdfIn PDF document text
    • http://remontlegko.info/juju_on_the_beat_download_mp310e9x.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/tjfijQT/how_to_test_micro_switch_on_golf_cart.pdfIn PDF document text
    • https://cdn.sqhk.co/kufejagefep/ggiejiY/mtp_ringtones_and_wallpapers.pdfIn PDF document text
    • http://bestunew.xyz/damepeyd4a1.pdfIn PDF document text
    • https://cdn.sqhk.co/gibewuzavi/eggFgjI/620515586.pdfIn PDF document text
    • https://miremewokar.weebly.com/uploads/1/3/0/7/130738658/740c9b151bb6644.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/good_flirty_chat_up_lines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/762de187-76ae-4788-aa0a-a3e0706574d2/what_is_the_wayward_son.pdfIn PDF document text
    • https://2a984544-7cb8-4a4d-9f60-e686f7994e39.filesusr.com/ugd/1434d3_dde0a711ac374edab25f09eb9db2e955.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/57537f66-745f-429b-98e9-f083aff2b4e2/31411181277.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/vemedadasavutixewija.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/33367924975.pdfIn PDF document text
    • https://144ece88-722e-4d59-a9d1-ae16887514c2.filesusr.com/ugd/48b17f_820d39ebc8bf4bffbf1696a2154aabb0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec267cda-ff2d-46e7-8cd5-fe38faca986c/48286915228.pdfIn PDF document text
    • https://d1897088-ef6e-4b60-8303-910b4b551fc1.filesusr.com/ugd/4cfbbd_a16f100a96844444ac93ada4b1237946.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_off0001a7b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7B0 5584 bytes
SHA-256: 90ec88580ae718890fd4f57f1ab03e79235255d2563ed06497d88f415b35f40e
font_01_sfnt_off0001ba93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA93 12232 bytes
SHA-256: b811f0a1ec6980999a13fa95136b274098bbc00cad22ecff339204e7c2511d3e