Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed99718baaec400…

MALICIOUS

PDF

66.4 KB Created: 2021-01-24 18:00:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5725cd8da8cb48bde876b8e6ea82e176 SHA-1: 193c6a55df030d5ccc0369d7df4dabc34bc6996f SHA-256: 2ed99718baaec4005562322e086d1b55af0c4e99ff6dc66bb148a4333e1533ec
244 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to suspicious or disposable hosting services, and one specifically to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to an owner's manual, likely intended to trick users into clicking these links. The ClamAV detection and ML classifier further support its malicious nature, indicating it's designed for phishing or malware distribution.

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://traffmen.ru/123?utm_term=genie+excelerator+2+owners+manual In PDF document text
    • https://gejiraje.weebly.com/uploads/1/3/2/7/132740564/derevorijuzepebuluz.pdfIn PDF document text
    • https://satataro.weebly.com/uploads/1/3/5/3/135350270/a68cabb6cf.pdfIn PDF document text
    • http://lalexejiwisejul.iblogger.org/lr_androids_showcase.pdfIn PDF document text
    • https://ferizovewop.weebly.com/uploads/1/3/4/8/134887996/gunivuwawak.pdfIn PDF document text
    • https://verumoxozuvije.weebly.com/uploads/1/3/1/4/131407377/nomegokokapa.pdfIn PDF document text
    • https://dobopekajami.weebly.com/uploads/1/3/4/3/134314215/8879438.pdfIn PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/doruwarupawan_xobagozulax_vifuwiru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401711/normal_5fe617dd9ce6e.pdfIn PDF document text
    • https://pazuvokase.weebly.com/uploads/1/3/4/6/134615635/mamonatipu_gemadaxepiva_sidarubidovunez_sopejexexidig.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464297/normal_60071a5375427.pdfIn PDF document text
    • https://vefamomapebimid.weebly.com/uploads/1/3/1/4/131406391/6923111.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378845/normal_5fca4cf44d2be.pdfIn PDF document text
    • https://lexikusu.weebly.com/uploads/1/3/1/4/131438729/358605.pdfIn PDF document text
    • https://rasazumeg.weebly.com/uploads/1/3/1/4/131454762/2a9c46753c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kakapefetabol.rf.gd/wotabaromiribuxeb.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/hotel_california_sheet_music_guitar_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/alameda_alliance_prior_authorization_form.pdfIn PDF document text
    • http://vodobugatusexa.epizy.com/rifigujonitilukatiroti.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_off0000c7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C2 5268 bytes
SHA-256: d668f36240faefdcf067de6dedaf2852b8b118f6e363c6f427c737e61dc06e6f
font_01_sfnt_off0000d9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A9 10156 bytes
SHA-256: 8b09c47e07ed840e66ba1e9036129d6a771dad958c6d7f7525af18aad8add573