Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b327c1494f7952c…

MALICIOUS

PDF

30.9 KB Created: 2020-05-31 20:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36f5ac85712c4d2027223b1f434823c9 SHA-1: cc36a026b31cb72674da3931a7b5822af1340152 SHA-256: 3b327c1494f7952c6d8909b26f713f39b7783749903704d7c8a64bb09ef34f3e
114 Risk Score

Malware Insights

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

This PDF document is identified as malicious by an ML classifier and exhibits characteristics of a phishing lure. It contains numerous external links, many of which point to SEO-optimized PDF files hosted on unrelated domains, a technique commonly used for SEO poisoning to drive traffic to malicious sites. The document body, though heavily obfuscated, contains URLs that are likely intended to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 30 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://seizediem.com/uploads/1/3/1/6/131606465/131606465.html#2009+mitsubishi+lancer+manual+pdf
    • http://centerforperinatalmentalhealth-fresno.com/uploads/1/3/1/3/131383678/zujinarowes.pdf
    • http://taynicolehairextensions.com/uploads/1/3/0/2/130273578/tikunapopibi.pdf
    • http://ministeriosreydereyes.org/uploads/1/3/0/3/130323705/wuxojasokow-xeruvotarepomex-pavokivalujowit.pdf
    • http://peoplefollowingjesusworldwide.org/uploads/1/3/0/8/130873990/9148628.pdf
    • http://inspirations4u.net/uploads/1/3/0/4/130476709/mumavulipu.pdf
    • http://justswapp.it/uploads/1/3/0/4/130483584/f26b84dfb66c.pdf
    • http://danvillepulmonaryclinic.com/uploads/1/3/0/3/130323196/2275121.pdf
    • http://drcathyb.com/uploads/1/3/0/6/130639061/tediferivabujiman.pdf
    • http://mvbabysitting.com/uploads/1/3/0/3/130323293/90928.pdf
    • https://gavajuw.files.wordpress.com/2020/05/zosulolodove.pdf
    • https://muvelipirudu.files.wordpress.com/2020/05/8046613358.pdf
    • https://gupadolajiwu.files.wordpress.com/2020/05/nubovuximi.pdf
    • https://wimilidovibi.files.wordpress.com/2020/05/metipabadeburex.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_off00005619.bin
790b8117b9bde4d539d2509e1d0aec98665c34ebf3f6fbffc402bc273b426c8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5619 7784 bytes

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