Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6ee3ba153905933…

MALICIOUS

PDF

58.5 KB Created: 2020-12-14 23:22:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 39768ccc20025c59d0518b08ff6b1344 SHA-1: e31ef449f340da98d71500bea5dc79f4aeac4feb SHA-256: f6ee3ba15390593320aad320003dfb521e2be54192930608c6319579dfffa02b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting it's part of a link farm designed to direct users to malicious sites. The document body, though heavily obfuscated, indicates a lure related to a 'business plan format for bakery'. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/aws?utm_term=business+plan+format+for+bakery PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4443814/normal_5fcc93b0e4029.pdfIn PDF document text
    • https://gesivakegozuk.weebly.com/uploads/1/3/4/7/134768451/146b6c6447fb.pdfIn PDF document text
    • https://dunujamovexen.weebly.com/uploads/1/3/4/3/134361976/3459126.pdfIn PDF document text
    • https://funebaxap.weebly.com/uploads/1/3/4/3/134399245/44f2068.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/3590787.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494166/normal_5fce124c1200c.pdfIn PDF document text
    • https://welerenumabo.weebly.com/uploads/1/3/4/4/134467224/1b78506b3c99.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/4cf0478a-877b-43dd-a648-65a0c977c194/26535339836.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ecff116eb00e3c4c108e/t/5fcff5ba8a12e71c19caebc3/1607464378454/fikizozibiperamaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e57393e-7542-4121-818b-b8f44956d534/how_to_draw_lightning_effects.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98d4bd93-8fa3-4290-b7ba-5470b785bb3c/present_continuous_affirmative_negative_interrogative.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72eb31ff-75e9-48f2-8d25-4bbc932d1180/brother_mfc-j825dw_not_printing.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_off0000ab7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB7C 5404 bytes
SHA-256: c0ecba2940cea2d0f8029607c8674125e5c02df4491d0d3040aa76dcba354f1e
font_01_sfnt_off0000bdd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD3 9296 bytes
SHA-256: 2c54b8c64ba9d64774a09b2acda4f5fc686c05d82c7ccc36a3e02ff1b7a8358b

Open this report in the interactive analyzer, or submit your own file for analysis.