Malicious PDF — malware analysis report

Static analysis result for SHA-256 60041d50738431bd…

MALICIOUS

PDF

76.8 KB Created: 2021-03-30 22:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b4e58757b71160f30683af54ab5566fa SHA-1: 43782f836c5047bc4ef1cfcbefe373c61a78c845 SHA-256: 60041d50738431bde4503356c1fe1ebb440ae526d249dda83d02322c60003c99
214 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. It uses a QR-code lure. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/award?keyword=pdf417+barcode+generator+download PDF link annotation
    • https://zexajupa.weebly.com/uploads/1/3/4/6/134692079/e8a28188c20a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417528/normal_5fe70b2e3d19f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484814/normal_60609d7a4ae7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499300/normal_605621d7dd2b1.pdfIn PDF document text
    • https://xotozefubineru.weebly.com/uploads/1/3/4/5/134576546/09ab81fda013.pdfIn PDF document text
    • http://idealicaitalia-official.site/latest_sniper_games_for_ps4cmv77.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/fituwiwafagel.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/bC6icib/doctor_of_osteopathy_career_outlook.pdfIn PDF document text
    • https://wivopapam.weebly.com/uploads/1/3/6/0/136082265/pirulege_xonafid_fesazesuk_vufob.pdfIn PDF document text
    • http://yatvoyya.fun/lg_top_load_washing_machine_bleach_dispenser_not_drainingde4o9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_604f0e76a2c33.pdfIn PDF document text
    • https://levonosaxedose.weebly.com/uploads/1/3/2/6/132695543/jowusofa_pigitopaxenok_pibaruvibavivi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467561/normal_5fe90aefe6b98.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/Jx1hcid/88240614006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452595/normal_600b0f59b29c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373526/normal_5fd3366598c0e.pdfIn PDF document text
    • https://sudarotabodubig.weebly.com/uploads/1/3/1/4/131407445/ab0698a37b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468871/normal_5ffa091fc1602.pdfIn PDF document text
    • https://cdn.sqhk.co/disarelas/iijwILA/61554845028.pdfIn PDF document text
    • https://komibaxes.weebly.com/uploads/1/3/1/6/131606619/2535566.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_605943674fcb7.pdfIn PDF document text
    • http://chelamela.org/similar_structure_of_text_talk_novel_blog_and_hyper_poetry2bcbc.pdfIn PDF document text
    • https://jukudedavat.weebly.com/uploads/1/3/0/9/130969580/2788499.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eeb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB1 5464 bytes
SHA-256: 621e0f99e929ba1a67f396bb02ea68934393a3c5c0e7ec5b17858e26d5f9849f
font_01_sfnt_off00010179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10179 10736 bytes
SHA-256: ebb76902e78097c6c6892c72c34d16b101fcacdb95e849f12f126558fd41a786