Malicious PDF — malware analysis report

Static analysis result for SHA-256 aee5835acfc38267…

MALICIOUS

PDF

88.8 KB Created: 2021-03-16 17:43:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 656a1e188b42d070fac6f9791b15dfbd SHA-1: d4fe8e26e453f525d8a1b97e89b5a287ba3372fe SHA-256: aee5835acfc3826784f7a02deaf96ebf0c1bc54549dda9358d658e00d46abd65
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary one pointing to a URL that appears to be a redirector for a phishing or malware campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, as the document is structured as a link farm on disposable hosting. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/strik?utm_term=the+alienist+season+3 PDF link annotation
    • https://cdn.sqhk.co/govonesed/1vjhiV8/nifejupategatejomejobiwu.pdfIn PDF document text
    • https://cdn.sqhk.co/novoganug/ajbjchb/27071937958.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/UdfJhg4/xojesiwonajixubimu.pdfIn PDF document text
    • http://1eyvgo.xyz/baludalemuvazab3eb0u.pdfIn PDF document text
    • http://stal-kemerovo.ru/pression_osmotique_exercicewwx78.pdfIn PDF document text
    • https://cdn.sqhk.co/givesaxi/ghcgigg/30416470131.pdfIn PDF document text
    • http://damvglaz0.xyz/kitejegilasugamuxosagepxw1yl.pdfIn PDF document text
    • http://zobebukore.22web.org/my_amnesia_love_full_movie.pdfIn PDF document text
    • http://natlab.ru/energia_hidraulica_ventajas_y_desventajas64dl5.pdfIn PDF document text
    • http://strita.space/taylormade_golf_m2_manuala0ivm.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/m2geegf/asgard_s_wrath_vr_trainer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nodefojabotozij.rf.gd/condom_size_guide_trojan.pdfIn PDF document text
    • https://2d2b1dae-c014-4902-97e6-c3f1d56915cd.filesusr.com/ugd/70e5f7_6e6d1dfdaeb242b68a7814a40eff4941.pdf?index=trueIn PDF document text
    • http://tenurusimuxu.epizy.com/85006203731.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca6ca226-45dc-44dc-a618-2ba9b2f41fa0/sijinevamet.pdfIn PDF document text
    • https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_bd8e611b92d24f88848d8da73b3d4b6e.pdf?index=trueIn PDF document text
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_a64313f3b8ad4fd5a3c6b3c9cc5add67.pdf?index=trueIn PDF document text
    • http://dixadenidufudu.epizy.com/lr_baggs_anthem_sl_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54d40950-53e4-465f-9971-9f7b7add2796/jebapifuja.pdfIn PDF document text
    • https://2a04f01a-7147-4793-98aa-b59dc93e6f96.filesusr.com/ugd/efcdeb_cb868e12337a4a1a8480315994f1e2ed.pdf?index=trueIn PDF document text
    • http://tofezaniv.rf.gd/parudosanibaxorifodaf.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBF 4788 bytes
SHA-256: aae910c5c17c71da135123c755b63f199f1b657b8be619ec572ea476bd6819bf
font_01_sfnt_off00012e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E03 12360 bytes
SHA-256: 3246aaa4e314054bac19b6894edb512f3a3f781788e3537b93569a343e49db93

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