Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebbce6ff78209678…

MALICIOUS

PDF

66.1 KB Created: 2021-05-11 22:27:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d84c203cacf8ebc31579318e32b60a80 SHA-1: 81c6b3a1cca2df485dd80c367dc536e5d09e3e3b SHA-256: ebbce6ff7820967843879478accf8e02b14f4e2c612cdfcfbacd8c8544ecc2c6
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 0.9998

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://leonvi.ru/strik?utm_term=tl-wr841n+v13+firmware+upgrade PDF link annotation
    • https://cdn.sqhk.co/kasavakujosi/ugdgdgc/money_hack_clicker_heroes.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/cancer_da_prostata.pdfIn PDF document text
    • https://cdn.sqhk.co/dasadogiso/dygfhce/518037487.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/r26vjdz/ultra_fidget_spinner_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vidikusupegu/cE7HLTy/41567803520.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454432/normal_5fddc6f651a59.pdfIn PDF document text
    • https://cdn.sqhk.co/vujixete/j6fPgh5/46972912650.pdfIn PDF document text
    • https://bomegudezami.weebly.com/uploads/1/3/1/0/131070148/0ecf8.pdfIn PDF document text
    • http://lixebafevoku.mypressonline.com/rotadato.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367912/normal_6006f0eaccd62.pdfIn PDF document text
    • https://widedopeb.weebly.com/uploads/1/3/5/9/135970132/sajobumuwado_birekajazisatuk_pigovopup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c25f9d31-7a31-4993-b097-7298af6fb206/kahr_arms_p380_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e00c52d5-5dfd-4c26-8fa4-b86887a3de1e/91313723572.pdfIn PDF document text
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_499f8d8201124934912ebcf19e56221d.pdf?index=trueIn PDF document text
    • https://cb38ef3f-1f2c-4622-8962-dca261660167.filesusr.com/ugd/3ae201_b38aacb432f245878aaf5e7b13bb8555.pdf?index=trueIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_6443eedd7b8947a39f2f13721d409924.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2e773b9-8a19-47c5-a70f-ac0789c4b41b/33343251130.pdfIn PDF document text
    • http://gixopiv.onlinewebshop.net/judeludoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f5b8a3c-a600-4e10-9df0-e787aafd229f/zivadezapir.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_off0000c369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC369 5812 bytes
SHA-256: 175320eb171b77ffdf5860b5da324b76e598187c7bb8034a70bda66985688a1a
font_01_sfnt_off0000d74f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74F 10600 bytes
SHA-256: 3262ca6e5beb0ab5fd0f3fbb9b8fac6c173283b693e3d9e66bf9fc47e3816547

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