Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba806f7a6a6340a…

MALICIOUS

PDF

75.4 KB Created: 2021-01-30 15:27:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 44d983e549a69c67287565a2b734bb95 SHA-1: de29112b776fd4fb1db45b95b701d1e40b99aecf SHA-256: 5ba806f7a6a6340ad342dc7b54214a19eb0e3b6a659261bfef58e7747591191a
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=anger%20of%20stick%205%20zombie%20apk%20download In PDF document text
    • https://finuvowevemez.weebly.com/uploads/1/3/5/3/135397693/jidizuwivoguxub.pdfIn PDF document text
    • https://cdn.sqhk.co/zotevokep/eBxvZib/4238460866.pdfIn PDF document text
    • https://cdn.sqhk.co/jedelamodafa/dRa4jdR/e_bikes_for_sale_cheap.pdfIn PDF document text
    • https://vitovoraf.weebly.com/uploads/1/3/1/1/131164311/zeleveredumud.pdfIn PDF document text
    • https://lusanazuwade.weebly.com/uploads/1/3/4/0/134000197/votawawiweb-wonanu-tubipo-sejizozesege.pdfIn PDF document text
    • http://frontend-developer-azaynullin.site/idml_to_converterlcodz.pdfIn PDF document text
    • http://ihsteam.ru/kuduzifatfnspm.pdfIn PDF document text
    • https://cdn.sqhk.co/mirofifuba/iThg8SW/soccer_world_cup_2018_quarter_finals.pdfIn PDF document text
    • https://cdn.sqhk.co/moleselofa/i5ggJMa/dikatesow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://titasukutisun.epizy.com/45860270921.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/lovineteru.pdfIn PDF document text
    • http://vumazudu.rf.gd/jadubusixux.pdfIn PDF document text
    • http://zakuvusebaj.epizy.com/sign_guidelines_diabetes_type_1.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/dead_by_daylight_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/goodwill_accounting.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_off0000e49d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49D 5932 bytes
SHA-256: 2453fab772caeef76d0218a105c55923dcd841faf4624c6c714bf9fcdfd13bcc
font_01_sfnt_off0000f8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E9 11088 bytes
SHA-256: b258cb8eaff10e3fe3c2882d18d89c004dcb2900efae66b53b3405c624c2a44c

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