Malicious PDF — malware analysis report

Static analysis result for SHA-256 d376890f8a892424…

MALICIOUS

PDF

63.7 KB Created: 2021-01-18 14:50:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: edb0c7293c30450ab3346d13ef3249ed SHA-1: 4faf679796f329841a5a9dfd177b1978e99d17d1 SHA-256: d376890f8a892424ad6a4cca32e2eb63692d93f84fdc9524b285d8e173970869
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 flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body contains metadata related to its creation, but no direct user-facing text that would indicate a specific lure beyond the presence of URLs.

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://bologen.ru/123?utm_term=indiana+state+archery+tournament+2020 PDF link annotation
    • https://cdn.sqhk.co/wafabojunawa/yjdjdi8/22005651347.pdfIn PDF document text
    • https://sovinupuni.weebly.com/uploads/1/3/4/7/134762808/tugef-wigugu-dedurupa-xubofogofij.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/gujarutubadaza_sotafif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496360/normal_5fcf88a91bf9d.pdfIn PDF document text
    • https://desokopozo.weebly.com/uploads/1/3/4/4/134473980/2422004.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzosexiwugu/vjdhiQ8/assembly_line_worker_resume.pdfIn PDF document text
    • https://cdn.sqhk.co/norifasil/jadhcBK/93005716670.pdfIn PDF document text
    • https://cdn.sqhk.co/kepilujofeje/gdjcihj/vefovomiguvoloxijasodori.pdfIn PDF document text
    • https://cdn.sqhk.co/nodewanase/i5fjciw/song_ringtone_free_download_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/libegavezu/bKie8Wc/corporate_strategy_vs_business_strategy_vs_operational_strategy.pdfIn PDF document text
    • http://madusotiju.22web.org/ronide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449605/normal_5fe69f0d4c2f7.pdfIn PDF document text
    • https://cdn.sqhk.co/wejuladuke/gieiejb/5838125923.pdfIn PDF document text
    • https://cdn.sqhk.co/nenakowi/SlvheBT/85224254066.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/q1hd4ma/85803660055.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/gcHjuig/activity_launcher_tricks.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kanusilos.epizy.com/accountancy_project_class_12_segment_reporting.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_off0000b7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7BD 5460 bytes
SHA-256: 5bc995db20fa165aa577ecc9024fb5d2a075e1f1c3862047bc165088c4a378a0
font_01_sfnt_off0000ca29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA29 11124 bytes
SHA-256: b6796a44013199cd62eb8e09b24b8077f1186151b472ceb7e2ae2e6ad957cfd4

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