Malicious PDF — malware analysis report

Static analysis result for SHA-256 e689b2ae1c5dd31c…

MALICIOUS

PDF

31.5 KB Created: 2020-03-11 14:40:47 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-15
MD5: 59f707fe046c119cd2bf168bcef30c62 SHA-1: 41a888058364a5aceb3cf7d257cfaada588ba602 SHA-256: e689b2ae1c5dd31c034aee4a3b1d1a7188e3dff4e5c0d588ca964062b2790a4c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or SEO manipulation tactic, potentially used to distribute malicious content or improve search engine rankings for malicious sites. No scripts were extracted, and the document body is heavily obfuscated, limiting further analysis of the specific lure.

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://buyorsellyours.com/uploads/1/3/0/4/130488884/130488884.html#formula+of+secant+method+in+numerical+analysis PDF link annotation
    • http://themavery.com/uploads/1/3/0/6/130604650/e3d5f630e7.pdfIn PDF document text
    • http://anappleatdawn.com/uploads/1/3/0/4/130483178/148eb.pdfIn PDF document text
    • http://www.naylzbeauti.com/uploads/1/3/0/4/130435978/4698522.pdfIn PDF document text
    • http://thevoicewithinme.com/uploads/1/3/0/5/130590561/xidumepove.pdfIn PDF document text
    • http://www.amityvilleroofing.com/uploads/1/3/0/6/130604552/lizusexobalivotu.pdfIn PDF document text
    • http://christyrobbcareerandlifestyle.com/uploads/1/3/0/2/130289397/1458792.pdfIn PDF document text
    • http://stunningsphynxkitten.com/uploads/1/3/0/6/130604789/gerebodozuguno.pdfIn PDF document text
    • http://2xch.com/uploads/1/3/0/5/130543133/rejobijumokevak.pdfIn PDF document text
    • http://thechristinaleavenworth.com/uploads/1/3/0/5/130552097/povuwozaxigo.pdfIn PDF document text
    • http://kunalsen.org.uk/uploads/1/3/0/5/130589269/173acce68.pdfIn PDF document text
    • http://youngkingsglobal.com/uploads/1/3/0/7/130776629/gijifumuw.pdfIn PDF document text
    • http://limonka-lodz.pl/uploads/1/3/0/7/130776125/mibazuranol_buvegetami.pdfIn PDF document text
    • http://graemeburk.com/uploads/1/3/0/6/130622032/tevugikur.pdfIn PDF document text
    • http://mythermaltv.com/uploads/1/3/0/3/130313445/tuzowajixubum.pdfIn PDF document text
    • http://consultingeservices.com/uploads/1/3/0/6/130604126/biwugez.pdfIn PDF document text
    • http://mirageestates.com/uploads/1/3/0/2/130289735/ribaxapomerobod_sabebugoxoj_mexawabobefe_mupovumaxi.pdfIn PDF document text
    • http://pallasgem.com/uploads/1/3/0/6/130639052/f1bef.pdfIn PDF document text
    • http://maddieandpat.com/uploads/1/3/0/6/130621436/5c63e8.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 3

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_off00005808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5808 6008 bytes
SHA-256: e6d78be766f5578d3305c33fd8ad1fdc0521800bfe3242da09e16a7af297db5c

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