Malicious PDF — malware analysis report

Static analysis result for SHA-256 a860932946a85fba…

MALICIOUS

PDF

73.5 KB Created: 2021-03-08 01:46:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4889cf4510b97648f45f41636e3e1290 SHA-1: 40da3aca2e95428baeaa4ecde8a8966fd09635fd SHA-256: a860932946a85fbabd1a992e24e709106f662decb90e0b9a50664c9622c71c30
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm. The embedded URLs and the overall structure point towards a phishing or malware distribution scheme, likely initiated via spearphishing.

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://resalured.ru/strik?utm_term=gluten+free+low+carb+diet+meal+plan PDF link annotation
    • https://suxamoka.weebly.com/uploads/1/3/4/8/134876373/bed0df32fe4c.pdfIn PDF document text
    • http://vknart.xyz/51805161497vwmuz.pdfIn PDF document text
    • https://sujabowumosof.weebly.com/uploads/1/3/1/3/131398195/5544399.pdfIn PDF document text
    • http://idealica-italiaofficial.site/cinema_apk_v2_firestickrjnfu.pdfIn PDF document text
    • https://cdn.sqhk.co/rovifatira/uGFWVhf/minecraft_free_server_hosting_24_7.pdfIn PDF document text
    • http://arendaavto.taxi/parent_plus_loan_fee_calculatorb7fdt.pdfIn PDF document text
    • https://nedetuvozuwe.weebly.com/uploads/1/3/4/6/134699612/wamotinumodadar.pdfIn PDF document text
    • https://kipunelikerave.weebly.com/uploads/1/3/0/9/130969086/035ed92ea9f0a.pdfIn PDF document text
    • http://xilexevu.scienceontheweb.net/lizefovajuvenon.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/new_9.9_evinrude_outboard_motor_for_sale.pdfIn PDF document text
    • http://bagesopabiwub.scienceontheweb.net/how_to_learn_korean_fluently_fast.pdfIn PDF document text
    • http://momentshop.space/domuwigqsmk.pdfIn PDF document text
    • https://fuwupizur.weebly.com/uploads/1/3/5/3/135390256/53bbef173a5b.pdfIn PDF document text
    • http://pililiriniru.mypressonline.com/81451203649.pdfIn PDF document text
    • https://zagemixawidi.weebly.com/uploads/1/3/1/3/131378918/komopitupamivi.pdfIn PDF document text
    • http://tixshopclub.fun/96842302448zej63.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/HlEhcgd/run_gun_banditos_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bejanifezilo.atwebpages.com/toro_greenkeeper_user_guide.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE388 5388 bytes
SHA-256: d3d8a2c6aa4064ad2aa2576daa9cdb4ae3ef909361a267144f56dee6a8ce2322
font_01_sfnt_off0000f5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D7 10264 bytes
SHA-256: e1e9881827aae8e7ea4772e360f39de680e4f053f781014ad8e55c6941df7bb6

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