Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1ec9a6e1000204…

MALICIOUS

PDF

75.8 KB Created: 2021-02-28 04:08:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b98ee28f97af4aa3a8623d3d8e3cf5b8 SHA-1: 287ed84b60b0448c78fdd7b471dbd93aee33cec6 SHA-256: fa1ec9a6e1000204d02d66709357e870beca14b7205f148eb4b1143a5a16a0f9
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains text related to hair coloring, which is likely a lure to direct users to malicious URLs such as https://pelibifir.ru/strik. No scripts were extracted from this sample, but the presence of numerous external links indicates an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://pelibifir.ru/strik?utm_term=how+to+use+ion+demi+permanent+hair+color PDF link annotation
    • https://senovaxevuka.weebly.com/uploads/1/3/5/3/135304629/sufebukeg-wuboteruvugubu-tuwibineli-lopilonasuv.pdfIn PDF document text
    • https://timifuxi.weebly.com/uploads/1/3/4/6/134676324/2db641739e2.pdfIn PDF document text
    • https://tasitonedilegu.weebly.com/uploads/1/3/5/3/135301248/7753376.pdfIn PDF document text
    • https://tanifovekula.weebly.com/uploads/1/3/1/3/131379991/6868340.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403808/normal_5fd7b19831e3c.pdfIn PDF document text
    • https://pefuwopiluja.weebly.com/uploads/1/3/4/5/134592541/6f92ca536.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448719/normal_5fd81a8bdaf4d.pdfIn PDF document text
    • https://noxiwojudom.weebly.com/uploads/1/3/4/7/134723323/8557576.pdfIn PDF document text
    • http://waxinexedodupij.22web.org/aap_se_milkar_mr_jatt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rukudukewa.epizy.com/cengage_organic_chemistry_part_1.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/rofibajigogozan.pdfIn PDF document text
    • http://fujuwadutat.epizy.com/ap_psychology_unit_2_review_quizlet.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/analog_tv_channels_guide.pdfIn PDF document text
    • http://libejejizu.epizy.com/interview_questions_and_answers_on_sql_database.pdfIn PDF document text
    • http://tojozojorezew.epizy.com/types_of_steering_gear_box.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB33 5368 bytes
SHA-256: d083122a25860f71ffef295af791ff0e0221e2b4bd20bf153ee4bc66b7a9c6c9
font_01_sfnt_off0000fd53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD53 10844 bytes
SHA-256: d2ef25815b76afb13307c9ada2d5185a1c0aa769df204f4e4c64307a2c2e3266

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