Malicious PDF — malware analysis report

Static analysis result for SHA-256 d168439d29a348b6…

MALICIOUS

PDF

94.8 KB Created: 2021-02-14 13:58:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a6e52fc18ad5059edbaa54681b4b38aa SHA-1: 89065e10402935c27d737fac281634054ca7f00c SHA-256: d168439d29a348b6a6e422e77db5f40d2a231f661c3c2de0245b39cb842509c6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious content. The PDF contains numerous embedded URLs pointing to disposable domains, characteristic of a link farm designed to obscure the ultimate destination, which is likely phishing or malware distribution. The presence of external URIs and the link farm heuristic strongly suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://leonvi.ru/wix?keyword=temperate+grassland+plant+adaptations+examples PDF link annotation
    • https://cdn.sqhk.co/nedovipirumu/Pghnghn/cut_the_rope_2_game_download_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/judigirowe/cD5hehf/fipewirejuba.pdfIn PDF document text
    • http://zikapipumimapo.22web.org/dwg_trueview_2019_free_64_bit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445555/normal_600d1279c1ade.pdfIn PDF document text
    • https://balijijileg.weebly.com/uploads/1/3/4/5/134505585/luditesemetinafumuza.pdfIn PDF document text
    • http://taxafig.66ghz.com/95163538340.pdfIn PDF document text
    • https://cdn.sqhk.co/girasufu/hcificS/62497947927.pdfIn PDF document text
    • https://polokoxukoneg.weebly.com/uploads/1/3/2/8/132816042/2086fd4b8f1.pdfIn PDF document text
    • https://cdn.sqhk.co/visesefider/gfghGje/lidotigepobizofar.pdfIn PDF document text
    • http://tozepefaj.iblogger.org/cars_fast_as_lightning_game_softonic.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/84756465574.pdfIn PDF document text
    • http://xukitekebuza.epizy.com/julagonolajufaj.pdfIn PDF document text
    • http://gunagiweraji.rf.gd/budget_planner_program_free.pdfIn PDF document text
    • http://zefixufedinokas.epizy.com/english_language_paper_1_model_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/chevy_malibu_2016_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/74634919569.pdfIn PDF document text
    • http://gexazavere.epizy.com/singam_dance_video_song.pdfIn PDF document text
    • http://bogizun.epizy.com/zomanivimur.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_off000136c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136C6 5296 bytes
SHA-256: d7be61bb949c2a088a9b163f3505c4abe79b49aac4cfea3e913b78e6cac5063e
font_01_sfnt_off000148b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148B0 10716 bytes
SHA-256: 63d141b6a08b935dac09482c181e925f7d8e120d973f56e366f2876bffc00869

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