Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ebdd035ba5374d…

MALICIOUS

PDF

76.7 KB Created: 2021-02-15 10:27:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fda3771f23922cd381e8d54bb10cbb7c SHA-1: 792358f88d2583c6e87ae3f8a39167315a876f7d SHA-256: 12ebdd035ba5374dca7e0f69657b12d9244bcbbbfee733a33817448e771d960a
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO link farms and phishing lures, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_URI' heuristics. The 'SE_INVOICE_LURE' heuristic suggests the document's content is designed to trick the user into clicking these links, likely to download a second-stage payload or redirect to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=janesville+youth+baseball+facebook
    • https://sidopaxabu.weebly.com/uploads/1/3/1/3/131398246/930add.pdf
    • http://groby-ritual.online/242353001809itnz.pdf
    • https://roxobirunuj.weebly.com/uploads/1/3/4/0/134096027/sitig.pdf
    • http://mir23.xyz/bird_rescue_center_bangalorei0p2w.pdf
    • https://xadupokunarufi.weebly.com/uploads/1/3/2/7/132710624/2265917.pdf
    • https://mulokigapasol.weebly.com/uploads/1/3/1/0/131070847/papowaxiletovi.pdf
    • http://eslife.pro/beechcraft_bonanza_f33a_maintenance_manualfmolq.pdf
    • http://kismyketio.com/wajexogepikirivokakulcc800.pdf
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/pexixixuligawakuker.pdf
    • https://jaxenexeleti.weebly.com/uploads/1/3/5/3/135320290/lugabafolifoj.pdf
    • https://tulivugid.weebly.com/uploads/1/3/4/6/134607321/fee21a.pdf
    • http://formulamoney.top/dating_a_truck_driver_forums3utfb.pdf
    • https://lopowizuxo.weebly.com/uploads/1/3/4/4/134438001/kapaxikev.pdf
    • http://freefire-gifts.com/mezufagepozagpik0b.pdf
    • http://cloudmarket.website/xugetimurasetezonaszt4g.pdf
    • https://jonimewogil.weebly.com/uploads/1/3/1/8/131860125/tusepesogupas-mupuw.pdf
    • http://potenciy.xyz/fovinebojafuxanobujawej79mox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/benuka/gedazijasajorave.pdf
    • https://s3.amazonaws.com/ladiwuzetawedi/logarogababunumazusemo.pdf
    • https://s3.amazonaws.com/rotowan/chest_2012_guidelines_heparin_induced_thrombocytopenia.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_off0000e54e.bin
1e0f9e1e28e461c8bd73d4b41be791566a6644c1e399e0029b0bc650a15f430b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE54E 5228 bytes
font_01_sfnt_off0000f72a.bin
38ef86e69435104ed6a2d2c9ae5fe57a4fb8086bf304de635a2264302802c0eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF72A 14976 bytes

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