Malicious PDF — malware analysis report

Static analysis result for SHA-256 39c6c172bb30913d…

MALICIOUS

PDF

67.7 KB Created: 2021-03-23 04:01:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 63e58964adcdfe4122096bed2628eb8d SHA-1: 5333b0b4b13f8ce8d85ccea63c64f14fe8b837a6 SHA-256: 39c6c172bb30913d8b7fd9c712e7e3ef13e84ed810af1a6b43e696b627fd14e4
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, likely intended to manipulate search engine results or direct users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lead users to potentially harmful content.

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://jottigo.ru/wix?keyword=100.9+jack+fm+listen+live PDF link annotation
    • https://dopitusorotid.weebly.com/uploads/1/3/0/7/130738794/9490732.pdfIn PDF document text
    • https://rojogude.weebly.com/uploads/1/3/4/3/134396813/191927.pdfIn PDF document text
    • https://cdn.sqhk.co/mapelimujeku/heVYjdJ/2627236958.pdfIn PDF document text
    • https://suzagosezamonu.weebly.com/uploads/1/3/4/4/134446802/9fdef.pdfIn PDF document text
    • https://defiduzumuxel.weebly.com/uploads/1/3/2/6/132682342/gateditip.pdfIn PDF document text
    • http://ladirojenovezoj.mygamesonline.org/amharic_english_bible.pdfIn PDF document text
    • https://ronenajawewaxiw.weebly.com/uploads/1/3/4/5/134594127/3538093.pdfIn PDF document text
    • https://betivaronapan.weebly.com/uploads/1/3/5/3/135350750/528406.pdfIn PDF document text
    • http://nepoxiduvilej.scienceontheweb.net/kusumer.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/D2hdif9/98053089554.pdfIn PDF document text
    • https://siresikewutawin.weebly.com/uploads/1/3/0/7/130739490/a70ba2492e79f75.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://vujuvisesakok.myartsonline.com/honda_gcv160_pressure_washer_not_building_pressure.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/97418648028.pdfIn PDF document text
    • https://ef90beaa-bca2-431e-862c-49c19dd94618.filesusr.com/ugd/06497e_37316c076e094032bd89516d1b7d9942.pdf?index=trueIn PDF document text
    • https://a001dc82-f31e-4944-9b76-0a8e602b6855.filesusr.com/ugd/e4ee87_cf7656761db449698a1ee2325978164e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/22283269053.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/adritec_news_repo.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_off0000beff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEFF 5096 bytes
SHA-256: f2bc17e6f0241af18f90045bdba6f62a952e342d3d6b00f367725540bcf3d007
font_01_sfnt_off0000d04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD04A 10032 bytes
SHA-256: 47cbc9283fd5066d8a1893304958da06cb38fc360a266780113bc7e7443a0583
font_02_sfnt_off0000f29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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