Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b4515893c20ea3c…

MALICIOUS

PDF

45.4 KB Created: 2020-05-14 01:40:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2cb91184451d59af67a95833efd47b98 SHA-1: c87f9d588289ac2244b15fc0461408ae31404ab5 SHA-256: 1b4515893c20ea3c73a6e6886ca50c7cb774a0301c623135662758b8322e03ff
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated and point to other PDF files. This behavior is indicative of a link farm or a mechanism to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment that the embedded links are intended for malicious purposes, likely to redirect users to phishing sites or download further malware.

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://mandihoward.com/uploads/1/3/0/3/130323622/130323622.html#landscape+management+plan+template
    • http://stuffedcart.com/uploads/1/3/1/4/131412955/fa9aae31c54120c.pdf
    • http://diana888.com/uploads/1/3/1/4/131483209/4a2e380.pdf
    • http://nancyhamiltonmyers.com/uploads/1/3/0/5/130589305/mogekabexadozog.pdf
    • http://funjalianjali.com/uploads/1/3/0/5/130589057/satotox-sidif-lifomid-tukorib.pdf
    • http://reviewus-please.shop/uploads/1/3/0/7/130775248/4782862.pdf
    • http://the-homeservice-pros.com/uploads/1/3/0/8/130813077/6368580.pdf
    • http://qacloud8.com/uploads/1/3/0/6/130605335/nujidipis_pozologinofewi.pdf
    • http://oaoainitiative.com/uploads/1/3/0/4/130488547/d8777900.pdf
    • http://housingcourt4all.com/uploads/1/3/0/6/130604018/5501186.pdf
    • http://tuninginwithlove.com/uploads/1/3/1/4/131406361/2403955.pdf
    • http://chicagoquinns.com/uploads/1/3/0/2/130271150/1981625.pdf
    • http://seasiderecords.net/uploads/1/3/0/7/130776824/946112b9c1a4c.pdf
    • http://rgtarizona.net/uploads/1/3/1/4/131438294/1023492.pdf
    • http://katiegracephotos.com/uploads/1/3/0/3/130323601/fofopok-kesivesuzodex.pdf
    • http://anantam.com/uploads/1/3/0/6/130604086/4826661.pdf
    • http://whisperofstitches.com/uploads/1/3/1/3/131380456/d0c939f593804.pdf
    • http://januarioassociados.com/uploads/1/3/1/8/131857241/8ea3dd395f5d97a.pdf
    • http://akart.ee/uploads/1/3/0/5/130540461/5485c3d34adb.pdf
    • http://cocoscrc.net/uploads/1/3/0/3/130379219/2885506.pdf
    • http://altius-c.com/uploads/1/3/1/4/131438007/viretezimizopes_rekabami.pdf
    • http://medicareandretire.com/uploads/1/3/0/5/130550981/42c889c90.pdf
    • http://angelcleaningservice.net/uploads/1/3/1/4/131437756/goxapigejibudus-waselipa-suvefewefavaza-poxifibofewogad.pdf
    • http://espanolachiropractic.com/uploads/1/3/1/0/131070571/7847132.pdf
    • http://specialtynailwholesale.com/uploads/1/3/0/6/130621951/majejavilazex.pdf
    • http://rousegifts.com/uploads/1/3/0/6/130639763/39ab20.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_off0000870d.bin
e010a47c93e63fdfbf6dc32715bde60ba01fdd4beb28d9ad35a996ac737c990e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x870D 10016 bytes

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