Malicious PDF — malware analysis report

Static analysis result for SHA-256 91aaad093e0d403d…

MALICIOUS

PDF

77.0 KB Created: 2021-03-10 06:30:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 555c78378208b0c47c7d329dc86f5a85 SHA-1: 6ec134f6a2d9c51ce706bec5347aa1f20e899242 SHA-256: 91aaad093e0d403ddac33a911c3a788d6ad67c679883f01c468b3f97b84f88aa
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated and point to potentially malicious domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

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://jumiwimov.ru/wix?keyword=cavern+of+remembrance+mineshaft+jump
    • http://wajazenizur.mywebcommunity.org/84271387326.pdf
    • http://ludirobus.getenjoyment.net/falosobuti.pdf
    • http://midumadataresut.66ghz.com/81893504656.pdf
    • http://linodogeb.scienceontheweb.net/wowitilona.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/70bad328-facf-40bc-beeb-f4abf86f79b0/vetewofusosipamamikutabuv.pdf
    • https://9b08d158-0e0f-4203-9b31-e1272d977b1c.filesusr.com/ugd/086daf_f0162a9368b64ffe9c0b2bb563c94b4b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2d37eb69-8933-4f00-b627-872932099172/porque_cuando_como_me_mareo.pdf
    • https://s3.amazonaws.com/gasodamuza/chrome_cookies_extension.pdf
    • http://jifimurosesapu.atwebpages.com/pengertian_asidi_alkalimetri.pdf
    • https://uploads.strikinglycdn.com/files/25b347fd-1143-4d9d-89b7-6eab0be562fb/zekevekijojudedajegaki.pdf
    • http://diwomikutaz.epizy.com/zeboberuweres.pdf
    • http://nidomovux.epizy.com/nikotofumopozudo.pdf
    • https://4095172d-bd2f-4181-91d7-dd424e653400.filesusr.com/ugd/df73ab_3dece0ab566245adb59736a4820b02cc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ee76a38d-a74f-4fcf-9833-d0e84f0acac8/13475327041.pdf
    • https://uploads.strikinglycdn.com/files/0715965c-57ae-4e25-b881-46ff450a4997/what_is_gni_per_capita_rank_minus_hdi_rank.pdf
    • https://s3.amazonaws.com/safago/hip_hop_vocal_sample_pack.pdf
    • https://d7b50aa0-fea3-4edc-ba9e-4ed0094b0c60.filesusr.com/ugd/7f614e_a272baefed6f4730904d59faaf565dc5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b6a893bf-af46-49a6-a53b-c63cf6cb2f41/xelip.pdf
    • http://gekasudevij.epizy.com/sirovich_introduction_to_applied_mathematics.pdf
    • 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_off0000eff4.bin
9484019741d58f37aab80571d4f13f920704e41f774295c0d70ab23d1122c6af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF4 5404 bytes
font_01_sfnt_off00010239.bin
3ba7de8acd0d9935d27e2a3c924bce796497152ed2fd0948fcd4012ee1cb5bf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10239 10644 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.