Malicious PDF — malware analysis report

Static analysis result for SHA-256 eca30de1c64d1264…

MALICIOUS

PDF

94.9 KB Created: 2021-04-14 03:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1068e0b1138077e8e8cf750ca34698a1 SHA-1: 9313bef5ee69f42cc339176dd8d93b4cece5156e SHA-256: eca30de1c64d1264241234b30a453698f5813348bb08d4cfc8f0dce93c5a235a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a malicious intent to redirect users to potentially harmful websites. The ML classifier and ClamAV detection strongly indicate malicious content, specifically a phishing or trojan variant. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/strik?utm_term=scorch+trials+cast+imdb
    • https://zutiwijutorezaz.weebly.com/uploads/1/3/4/3/134354078/8179915.pdf
    • https://nametipij.weebly.com/uploads/1/3/1/1/131164318/moxazurenavek.pdf
    • http://leziwazedo.mypressonline.com/99406964299.pdf
    • http://pefipegukanijel.22web.org/champakamala_video_song_free.pdf
    • https://cdn-cms.f-static.net/uploads/4470835/normal_5fe7b3d3b4528.pdf
    • http://joxesozijemago.iblogger.org/cell_biology_multiple_choice_questions.pdf
    • https://cdn.sqhk.co/zuxafopagad/hhjajdE/kingdom_business_community_youtube.pdf
    • http://womuvizitina.mywebcommunity.org/rafovoriduwiw.pdf
    • http://kovuzaxaf.medianewsonline.com/1._what_is_the_difference_between_gravity_chromatography_and_flash_chromatography.pdf
    • https://cdn-cms.f-static.net/uploads/4371267/normal_60498a5a6dab2.pdf
    • https://cdn.sqhk.co/koditisalupe/y3cerie/metal_slug_2_apkpure_download.pdf
    • http://gesemalisezusa.iblogger.org/kedixofabevenaxerabufale.pdf
    • http://tiwujatujoput.mygamesonline.org/gewoxodar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://eecb1da5-82b7-48ef-90e5-6a20895c07e7.filesusr.com/ugd/88a84f_a1b23c008d1d421ab318f35b3d84cae8.pdf?index=true
    • http://ritarajekaxitev.rf.gd/30099025015.pdf
    • https://d19688e0-347f-4d9d-8cb3-d47c6e049f3d.filesusr.com/ugd/c618e9_9bf9d99d40ef4810b9dc9d13cadc9f0c.pdf?index=true
    • https://7980b0ff-2efe-48f4-a442-6c87bca80713.filesusr.com/ugd/9bd8c3_7fdf7e85531e4227bca5c3fa5e1603cc.pdf?index=true
    • http://pususarejopo.epizy.com/58143834277.pdf
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_606d9c8eae8f43e89e978e2f8bdff088.pdf?index=true
    • https://571cbd0a-ba82-408d-be6d-2df53a8fcfe5.filesusr.com/ugd/02af14_56cbc7a5afef4d11ac189c3a653e2bfc.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000134ba.bin
bb88155037ae8256edd14a1a991a35a784ba479e9754934b809691ae76fb3139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134BA 5420 bytes
font_01_sfnt_off000146f5.bin
b4a6c068a97775effbe5782385a9e80990532083b2a91d56f7f55ef4411943f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x146F5 11656 bytes

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