Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d0cd71c5775f226…

MALICIOUS

PDF

86.9 KB Created: 2021-05-30 19:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 93b3d36a6024744774c3dd8f6b2a6b03 SHA-1: 97ad0eee9ba2d2ed9a8e1dd5dba58a4dbe631543 SHA-256: 9d0cd71c5775f22637424157093d0486f0f21eadcf33e805bcdfebfc1c60a9a6
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lozipotod.ru/strik?utm_term=nenu+local+songs+arere+yekkada+female+song+download PDF link annotation
    • https://xewezepi.weebly.com/uploads/1/3/0/8/130813550/notitevodebep.pdfIn PDF document text
    • https://wivirupi.weebly.com/uploads/1/3/4/6/134666213/xaxidu.pdfIn PDF document text
    • https://nuzidobekoxap.weebly.com/uploads/1/3/4/7/134750252/2fbdd0c8c.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/34d72410a3.pdfIn PDF document text
    • https://pudawiwut.weebly.com/uploads/1/3/5/3/135342926/0514accc56.pdfIn PDF document text
    • https://piladokad.weebly.com/uploads/1/3/4/7/134759874/jevek-xunipenin-jezek-nelun.pdfIn PDF document text
    • https://kawepuwaseleza.weebly.com/uploads/1/3/4/8/134849925/e2fa3.pdfIn PDF document text
    • https://jezilifubi.weebly.com/uploads/1/3/4/8/134887413/28b9205.pdfIn PDF document text
    • https://lizoduloto.weebly.com/uploads/1/3/4/7/134701777/vopabiwajemed.pdfIn PDF document text
    • https://wuwixebesa.weebly.com/uploads/1/3/4/5/134506807/7513618.pdfIn PDF document text
    • https://lisamotakix.weebly.com/uploads/1/3/4/3/134308999/9b27f4a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9b17eb5-be8b-4a20-a7d4-6215198d0f4c/wureganusitijulamoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcc57143-f515-490a-a109-cf67727998aa/2914446928.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d8ccb5d-9e5c-4f1e-b386-44975ea42efc/visasopowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba37aca1-e8eb-4df5-b820-a8843df354c1/kayla_itsines_bbg_1.0_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04c931af-1f1a-48d7-9424-46988c16fed8/bovemovotupenoweriku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0f34dd9-daf1-45ec-9da2-b8a67dd126d4/the_sedona_method_by_hale_dwoskin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdb3bec4-95e3-48b3-8f12-9d630073a32d/how_to_make_round_loom_hats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ea9e825-9900-425e-9cf9-f6b665b73047/fidiboxetugewuxawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5518429c-bd21-477d-a61d-59df557ae866/exercices_sur_les_adjectifs_et_pronoms_possessifs_en_anglais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84e0e707-bbcc-4526-8d79-402bb6d9ccd4/pupojona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4571d8a-6363-4730-8e35-a71227307cf5/nobika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbbf1acd-07b6-4aad-a255-5078d19d12f5/pioneer_av_receiver_vsx-523-k_manual.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_off0000efeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEB 5568 bytes
SHA-256: f5249399345d9565bf0b1fc0c17db9808942a382e224ca26b253512c8b258a3d
font_01_sfnt_off000102e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E1 14708 bytes
SHA-256: 46c04eb36ba287c9becfeec031604349bec1f2d441c6360955bc0ba8000660e5
font_02_sfnt_off00012850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12850 10836 bytes
SHA-256: fc238d696fe20dc467f8ba252c861441cc4c3feb082d895d119e4b53e76809c2

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