Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd3644347b547e2…

MALICIOUS

PDF

45.9 KB Created: 2020-03-10 06:45:36 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6343a6c0b52610bdcbfade6370cdf695 SHA-1: 9359e104807f2871e439f2b41bba643bf0813be9 SHA-256: 6dd3644347b547e2740bddc974374c28532f26c8d92a2f2ee909f702ab6d7590
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, identified as a link farm, which is a common tactic for SEO spam or distributing malicious content. The ML classifier strongly indicated maliciousness, and the embedded URLs point to potentially compromised or malicious domains. No scripts were extracted, but the sheer volume of outbound links suggests a high likelihood of redirecting users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://ywpu2.slpny.com/uploads/1/3/0/6/130620590/130620590.html#puerperal+pyrexia+nursing+diagnosis
    • http://thefantasyparis.com/uploads/1/3/0/5/130540193/suwosofudo.pdf
    • http://911-podarok.site/uploads/1/3/0/5/130589058/givofawovekasilizu.pdf
    • http://coolmanhaulage.net/uploads/1/3/0/5/130540882/3472835.pdf
    • http://www.heartlanddeermanagement.com/uploads/1/3/0/5/130588461/3528842.pdf
    • http://www.pjauthor.com/uploads/1/3/0/5/130550910/xadupawifiwek.pdf
    • http://webdisk.lapen.org/uploads/1/3/0/7/130775033/dumabalesizodil.pdf
    • http://family-love.daniellerosephotography.com/uploads/1/3/0/6/130621554/ea9ad1d4390eb6.pdf
    • http://bigfreshcontrol.com/uploads/1/3/0/7/130775002/9036846.pdf
    • http://mpoevents.com/uploads/1/3/0/7/130776599/rurik-sozigu.pdf
    • http://thesandwichclubnj.com/uploads/1/3/0/7/130776490/zidivi.pdf
    • http://asuperiorchoicecleaners.com/uploads/1/3/0/5/130546136/850881.pdf
    • http://notjustantiquespa.com/uploads/1/3/0/6/130620865/6415388.pdf
    • http://nordykeart.com/uploads/1/3/0/6/130620843/jafitavapufumelinupe.pdf
    • http://alejandroariza.info/uploads/1/3/0/4/130477085/zozututekexo_mafukogeremo_geludufuvobe.pdf
    • http://mx.floridahuntingoutfitter.com/uploads/1/3/0/7/130738988/11b36f5965.pdf
    • http://www.jsjewelryboxco.com/uploads/1/3/0/7/130738511/ravelugef-dinobenej-lewojixezo.pdf
    • http://bodycentralassignee.com/uploads/1/3/0/4/130483219/sodiwekefubi.pdf
    • http://goodmansappliancerepair.net/uploads/1/3/0/4/130489706/2bb987c9dd9.pdf
    • http://thebigskyconservancy.com/uploads/1/3/0/7/130739074/7cb3628d60cbdfd.pdf
    • http://judith.one/uploads/1/3/0/5/130543087/9b4febabc54270f.pdf
    • http://novanuae.com/uploads/1/3/0/6/130604724/368db8995bbd.pdf
    • http://peper.co.nz/uploads/1/3/0/6/130621208/suxaratudabomusif.pdf
    • http://www.ocartguide.net/uploads/1/3/0/6/130620317/buduravuleteru-wusizen-bisaso-gawetomilu.pdf
    • http://boni4judge.com/uploads/1/3/0/6/130621805/ranekawukazulaxema.pdf
    • http://gotblinkerfluid.com/uploads/1/3/0/3/130379528/55f205.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a35.bin
55d42e010e1e67790900e27e73f2b90e1044cc4f4fb7d81fb4b337e6c33f8fa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A35 8176 bytes

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