Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f9b39b2489788f…

MALICIOUS

PDF

79.7 KB Created: 2021-05-27 14:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 034108c448894f36f4f70849f783829b SHA-1: a0dd310c9f1b8bdcc6775c19994c0d0632fbf2d6 SHA-256: 01f9b39b2489788ffc077abe36810631dccf8ac00c43a1dff5a78ca0f25b898e
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links pointing to disposable hosting services, identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to potentially malicious or SEO-manipulative content, aligning with phishing or spamming tactics.

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://wubiwadodeta.weebly.com/uploads/1/3/4/5/134577579/nudimozid.pdf In PDF document text
    • https://bumewotosebixab.weebly.com/uploads/1/3/5/2/135298585/luwiwukelinuj.pdfIn PDF document text
    • https://ganokupojedozo.weebly.com/uploads/1/3/4/8/134890080/71b9510a263.pdfIn PDF document text
    • https://vixezijimike.weebly.com/uploads/1/3/5/9/135993975/damudiwadazovuxuwe.pdfIn PDF document text
    • https://lefesime.weebly.com/uploads/1/3/4/8/134882546/3500086.pdfIn PDF document text
    • https://duvutonog.weebly.com/uploads/1/3/6/0/136020002/c7e3f7b7.pdfIn PDF document text
    • https://muwirejevom.weebly.com/uploads/1/3/1/8/131857435/sodogu.pdfIn PDF document text
    • https://betixajivuf.weebly.com/uploads/1/3/4/9/134900014/9216125.pdfIn PDF document text
    • https://gosizunasinati.weebly.com/uploads/1/3/0/7/130739879/6117065.pdfIn PDF document text
    • https://rojofasefimo.weebly.com/uploads/1/3/1/6/131636828/08e825630823a.pdfIn PDF document text
    • https://zojobowexiwe.weebly.com/uploads/1/3/1/3/131380894/03d4066.pdfIn PDF document text
    • https://padipemoton.weebly.com/uploads/1/3/0/7/130739419/d4b02cdf8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486537/normal_60557dfb35ef8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497646/normal_5fe098d67a39e.pdfIn PDF document text
    • https://bizugejukuvav.weebly.com/uploads/1/3/4/3/134322279/e45890ce0cd5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/3IgsHNHpEfs/wb?keyword=international%20journal%20of%20research%20and%20analytical%20reviews%20publication%20feePDF link annotation
    • https://uploads.strikinglycdn.com/files/425fa417-612c-4857-90d4-d1fd403584b5/lefeluwab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ae19faa-225d-4e6b-8d14-ebba5f060a7f/how_to_install_windows_7_step_by_step_using_usb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a5f6cf5-be0c-4c4a-a7e2-e0abc220f24e/netgear_wgr614_custom_firmware.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ed3aff3-449e-49ca-9448-914aabf616c9/how_to_fix_a_battery_doorbell.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2C 5532 bytes
SHA-256: 20e8b68480865c1c429477554c9688ff4b91b7c4fee3d0ed7a2170a3b15cf38c
font_01_sfnt_off0000fd00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD00 10872 bytes
SHA-256: 5341a3dd8531f8bf531e4bc42daf3f9b3a2064bfd20de981ce2201a034b8ef6b
font_02_sfnt_off0001224f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1224F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176