Malicious PDF — malware analysis report

Static analysis result for SHA-256 0944123e09f3792e…

MALICIOUS

PDF

92.3 KB Created: 2021-03-16 04:38:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a8db7eaa25ac37842bdabc4b788a4be SHA-1: 9e3c52828d95056152ab43001b0a997ed8fb4385 SHA-256: 0944123e09f3792e39f149c1376d58610fc1f82cd870a7f9b4a0a393efc784c6
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with the primary URL being a suspicious domain associated with a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/wix?keyword=salmonidae+family+tree
    • http://adv-workshop.site/jaxirakuroriwed9oldn.pdf
    • http://naturfresh.fun/91446819385af9d.pdf
    • http://opensoda.pro/sisufunarelesasuta91x77.pdf
    • http://mon-cmso.best/30032154887am3lh.pdf
    • http://andyhongdigital.com/67636077219y4pzu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_b91b1b2a3fbf41fdb33328e019e77467.pdf?index=true
    • http://rujeziwuxe.rf.gd/acetylcholinesterase_mechanism.pdf
    • https://44f68060-d5e3-4d58-b4e7-e3760392f352.filesusr.com/ugd/49488e_04e1f350e23043fcbfb8bf6cd861dc8d.pdf?index=true
    • https://s3.amazonaws.com/kisimujuk/ranuronagufixa.pdf
    • https://uploads.strikinglycdn.com/files/4a7d1d90-b74d-44b9-bee3-719292cf5f33/craftsman_dys_4500_steering_gear.pdf
    • https://s3.amazonaws.com/vuraradaso/19030431762.pdf
    • https://s3.amazonaws.com/daraniwekamidir/gelatin_sheets_and_powder_conversion.pdf
    • https://s3.amazonaws.com/mokixetat/free_bengali_quotes_images.pdf
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_8d8237538aea4090893224eb813c59dd.pdf?index=true
    • https://f38be386-5799-403b-9303-fb121113655a.filesusr.com/ugd/6f1aa7_acff681050634c55abe2e24f84ea09cf.pdf?index=true
    • https://uploads.strikinglycdn.com/files/05b1b7f3-70c0-4593-968b-e3896b68a700/51586656140.pdf
    • http://sawezigulafufa.epizy.com/pet_kam_karne_ke_upay_video.pdf
    • https://18b09f4e-de4d-4c1b-9fe6-be55c63b1c00.filesusr.com/ugd/cd81e9_b0c232615ffe467d8a354e33a219af7c.pdf?index=true
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_4dcecd167cb644078b56e7cf9724a4ed.pdf?index=true
    • https://s3.amazonaws.com/dazinibonofobi/brownie_uniform_stockists_nottingham.pdf
    • https://0cc2a7d0-6f33-4335-9ec9-554d9418487e.filesusr.com/ugd/cb4a18_6458ec65b1a84203b3d0ec0d8eb66393.pdf?index=true
    • http://bebubizaguwadef.rf.gd/clinical_hematology_and_fundamentals_of_hemostasis_free.pdf
    • https://c480cc3d-c044-45b7-a7fa-747782367dcd.filesusr.com/ugd/a26f59_82427df892ad422d97254cfa9869f4f4.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fdc.bin
d34e7050f504e155d4f344599d8a07afe78e7fc19bacb10773a868f60fa3c4a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDC 4868 bytes
font_01_sfnt_off00013049.bin
e180e49bbcef12be99a59db4df54d9cec599abb4cc3579b7cbacfd860691ff33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13049 10916 bytes
font_02_sfnt_off0001554b.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1554B 4324 bytes

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