Malicious PDF — malware analysis report

Static analysis result for SHA-256 79617dde3ab8e2b0…

MALICIOUS

PDF

36.8 KB Created: 2020-03-29 09:38:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7c8f3604c7301f173693b97d7dc3fa25 SHA-1: fd85981a3790af2c86843b41e90eb050179c695c SHA-256: 79617dde3ab8e2b00570fa31246cfa7e4544a934270dd625847f9904d9481c07
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The document body text and embedded URLs suggest a lure related to unlocking software or game content, which is a common social engineering tactic. The presence of numerous PDF links points towards an attempt to distribute further malicious content or host malicious files.

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://74-123-79-110.mgwnet.com/uploads/1/3/0/3/130379110/130379110.html#flipaclip+unlocker+apk+bot
    • http://mgracetransitions.com/uploads/1/3/0/8/130874183/fonamabokovemajeje.pdf
    • http://juderjones.com/uploads/1/3/0/3/130379172/7495857.pdf
    • http://whitleyphotos.org/uploads/1/3/0/5/130547340/simikopobareduk-xezafiwavav.pdf
    • http://www.littledotmarketing.com/uploads/1/3/0/3/130379514/jefekuwil_tefuforeru.pdf
    • http://amitymedical.com/uploads/1/3/0/6/130621215/zogebikevujezeraxiru.pdf
    • http://brightburnproperties.com/uploads/1/3/0/4/130436483/zumizoxumuwadetedag.pdf
    • http://www.priteashop.com/uploads/1/3/0/5/130590779/lajagivobon_ravidisuxe_fazuxefef_nukimonujofurur.pdf
    • http://brbayouth.com/uploads/1/3/0/2/130288392/kadadufirigikujado.pdf
    • http://www.precisionbusinessenhancement.com/uploads/1/3/0/6/130604881/3840643.pdf
    • http://divinepurposedancefactory.net/uploads/1/3/0/6/130621480/lavevobugeruke-xixisusalel-riwafoti.pdf
    • http://oakislandhomeowners.org/uploads/1/3/0/3/130323462/1760215.pdf
    • http://nuneve999.com/uploads/1/3/0/4/130435611/giburozul.pdf
    • http://www.crazycrackeromaha.com/uploads/1/3/0/6/130639994/8545272.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_off000066bd.bin
dbec6d4902d20a6ce95952beb893c4b1d2752809fa591a58f2c6da6e69fff66e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66BD 8248 bytes

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