Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9c53f2ee927f504…

MALICIOUS

PDF

41.2 KB Created: 2020-03-13 07:49:14 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 83a7f7fee461f21fd7994bca418c4588 SHA-1: 36bd0fd99638cbf5737c33e2f4242e800a5c6e92 SHA-256: f9c53f2ee927f504080459b20034c18955747f672fac90eaef696a87c088a496
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded external links, as detected by the PDF_SEO_LINK_FARM heuristic. The primary URL points to a document about alkaline phosphatase elevation in dogs, but the majority of the links lead to other PDF files hosted on various domains. This suggests a link farm or a distribution mechanism for further malicious content, rather than a legitimate document. No scripts were extracted from this sample.

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://hostmaster.newskinandcare.com/uploads/1/3/1/1/131164039/131164039.html#causes+of+alkaline+phosphatase+elevation+in+dogs PDF link annotation
    • http://bathmasterdesigns.net/uploads/1/3/0/9/130969904/206aab79a951e.pdfIn PDF document text
    • http://dallasmusicalintruments.com/uploads/1/3/0/4/130475992/306ad0affa5419.pdfIn PDF document text
    • http://algebra.mybooksucks.com/uploads/1/3/0/8/130874239/mudig.pdfIn PDF document text
    • http://www.developplus.net/uploads/1/3/0/8/130874073/a304fb91.pdfIn PDF document text
    • http://cadecim.com/uploads/1/3/0/5/130547340/xagixo-wutiz-bamilagu-musufazopoji.pdfIn PDF document text
    • http://buckfinishes.com/uploads/1/3/0/3/130323158/roxerurunijunetegago.pdfIn PDF document text
    • http://www.purelyinbound.com/uploads/1/3/0/3/130323167/fukumid.pdfIn PDF document text
    • http://luxuryprimecar.com/uploads/1/3/0/6/130620788/fagesarewazu-volobokigesut-zamuwireze.pdfIn PDF document text
    • http://www.hundredrivers.com/uploads/1/3/0/2/130272977/kologifiwusul-nosiduzabagolo-zedotatafa.pdfIn PDF document text
    • http://mirandatinaphotography.com/uploads/1/3/0/6/130604446/nupadux.pdfIn PDF document text
    • http://webdisk.townofhelvetia.com/uploads/1/3/0/5/130551567/papunedorukufi-bakasoxogejasu-dilaluluguzip-rigefe.pdfIn PDF document text
    • http://noradavis.net/uploads/1/3/0/4/130477152/foxes.pdfIn PDF document text
    • http://www.bizitransportsllc.com/uploads/1/3/0/4/130477176/wifavukorejibe.pdfIn PDF document text
    • http://boxdropmattressoutlet.com/uploads/1/3/0/6/130639209/2948987.pdfIn PDF document text
    • http://winesavvy.co.uk/uploads/1/3/0/4/130476208/a7ce724.pdfIn PDF document text
    • http://capitalareaanesthia.com/uploads/1/3/0/6/130639076/jojofife.pdfIn PDF document text
    • http://www.elysiancreations.com.au/uploads/1/3/0/5/130588779/5407521.pdfIn PDF document text
    • http://ellaoliveyoga.com/uploads/1/3/0/4/130435784/sajojajodolurija.pdfIn PDF document text
    • http://www.okcpotspot.com/uploads/1/3/0/5/130590157/8a3399c.pdfIn PDF document text
    • http://oc3.co.uk/uploads/1/3/0/2/130272613/xesavomipux.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7876 7936 bytes
SHA-256: 20276eaa12bb2a73b3ef426eddc4b1f523e4d6c26b45a2dc3cce59e474104607

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