Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34325327a9711ed…

MALICIOUS

PDF

67.7 KB Created: 2021-01-06 14:00:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 21e938535b264a44a25a8290badad5f5 SHA-1: 090e5df23023ffbab9ea95bfd6cfffd1b0ad8845 SHA-256: d34325327a9711eded9750bb354601c5a162602e586a73cadd77f5bfd1227683
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many of which are to PDFs hosted on strikinglycdn.com, suggesting a link farm or spamming operation. One of the external links points to 'traffine.ru', which is likely a phishing or malicious site. No scripts were extracted, but the PDF structure and heuristics suggest it's designed to drive traffic to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://traffine.ru/aws?utm_term=bridal+couple+pics PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420438/normal_5fa43a5d59c87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454682/normal_5fe2da434ff27.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/1sGVfJs/wijovovotorubo.pdfIn PDF document text
    • https://zoxiniguve.weebly.com/uploads/1/3/4/5/134584112/bibovukaxox-janogapu-damose.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/jeejdgg/scmp_singapore_hong_kong_protests.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/65ade999-b203-44d3-8dac-90098544ead5/man_and_his_symbols_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd32f1d1-6003-475f-88f9-7e636ab50124/10_enunciados_admirativos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d70b913-9229-4772-b7d5-b68aaeb0d8ab/lounge_lizard_free_serial_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3376dbba-1361-4729-a755-d319c10bd633/44828052849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4206279b-e630-434d-8953-f1cb1cc3836c/ucsd_2017-18_calendar.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 2

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE30 5116 bytes
SHA-256: a63b807d23e7d136079623e3a5c2f55745129835e93a0183d0c4186642a2a795
font_01_sfnt_off0000dfa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA1 10172 bytes
SHA-256: 5f04b33b15f967c95aa7ecfb7c7044807315d8a61eec9f0477d763845174fd03

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