Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f5966bf5d04c7c9…

MALICIOUS

PDF

78.5 KB Created: 2020-12-20 02:42:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: cc672870e58444338e65cc0243d28e20 SHA-1: 31ecb2763519db71b52bcf6905a26aff33ce68d9 SHA-256: 8f5966bf5d04c7c91397d676b28d7a356b5333446b2157db8e513aa266a0373c
156 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 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://trafffe.ru/123?utm_term=tc+electronic+flashback+2+manual PDF link annotation
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/4875903.pdfIn PDF document text
    • https://dowezepuxaku.weebly.com/uploads/1/3/4/4/134463959/1519245.pdfIn PDF document text
    • https://josugonu.weebly.com/uploads/1/3/4/4/134488469/3947883.pdfIn PDF document text
    • https://samojajakab.weebly.com/uploads/1/3/4/6/134696950/5074746.pdfIn PDF document text
    • https://lobobofu.weebly.com/uploads/1/3/4/6/134680821/muxoxoxedolo.pdfIn PDF document text
    • https://vuteduwezo.weebly.com/uploads/1/3/4/3/134336695/misodovagawofafawusu.pdfIn PDF document text
    • https://lizimiligamib.weebly.com/uploads/1/3/4/5/134584059/jedamofafoz.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
    • https://uploads.strikinglycdn.com/files/7cb8a45f-42e8-4144-ba9a-525cb58b0d52/dubesawaviv.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc799c9a4492a057e246fe7/t/5fcc0d0605ddc9599d0e2c6e/1607208199815/sans_boss_fight_music_undertale.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc111025e8e827d428ec193/t/5fcf3a2b0ff3944fc555ea3f/1607416364498/sticker_maker_machine_amazon.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c48c104edf1d778017d3/t/5fd07d8775f5e50485730215/1607499143966/86319541802.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a450c17-298a-4501-875b-fa8a993d1471/pijupakufafojidemisedire.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf67211972c46e3c96ecfc/1606379297828/western_civilization_spielvogel_7th_edition.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE796 5288 bytes
SHA-256: ac05ec84c680bae2be57d555dfb3d492b8d4417afae21b494ebe23597ff344cf
font_01_sfnt_off0000f956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF956 11140 bytes
SHA-256: 1f505ed98e59983f199d3065b628b9064b56752da6bc38b5ab8329c1b099ff2d
font_02_sfnt_off00011ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF4 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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