Malicious PDF — malware analysis report

Static analysis result for SHA-256 470be69ad268a182…

MALICIOUS

PDF

36.0 KB Created: 2020-03-08 05:56:50 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fdebc80d92bad6b6001595fa389df182 SHA-1: 4e350f55443cd03be9dc2cf2143315b444d78ce8 SHA-256: 470be69ad268a1829753275fe6462ab75f37a2fc64b97c2e1d240a6b5bdcc098
94 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a technique often used for SEO spam or to redirect users to malicious sites. The document body text explicitly mentions 'Png format to pdf converter online', suggesting a lure to trick users into visiting these linked sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a large number of external links, likely for malicious redirection.

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://7wg65.slpny.com/uploads/1/3/0/5/130588744/130588744.html#png+format+to+pdf+converter+online
    • http://www.flagstopcrossfit.com/uploads/1/3/0/5/130589302/746592.pdf
    • http://camelcottage.com/uploads/1/3/0/6/130604117/bibakexapobu.pdf
    • http://firstmelissa.org/uploads/1/3/0/5/130551597/71ba51997935ab.pdf
    • http://www.lollye.com/uploads/1/3/0/6/130621128/3064330.pdf
    • http://aestheticsplus.club/uploads/1/3/0/3/130379361/fajidob-juzokakirari-jolawerata.pdf
    • http://casadelasuerteylafortuna.com/uploads/1/3/0/6/130621276/gafuv-fumixig-duvisakux.pdf
    • http://pamemazi.org/uploads/1/3/0/9/130969796/bikok.pdf
    • http://brandtbucher.com/uploads/1/3/0/6/130620811/logakebotawawez.pdf
    • http://www.vbchildrensmuseum.com/uploads/1/3/0/5/130588357/lipuzof.pdf
    • http://www.localgreenchoice.com/uploads/1/3/0/9/130969624/ponimapusi-komuxedenet.pdf
    • http://nutrimoda.com/uploads/1/3/0/6/130639859/9405017.pdf
    • http://thebeachybuzz.com/uploads/1/3/0/6/130621068/d0811abbac.pdf
    • http://fudgejj.com/uploads/1/3/0/6/130604812/3799c0ff.pdf
    • http://hitchly.com/uploads/1/3/0/2/130287279/8377501.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_off000064b2.bin
c70304e97f0a3cc8cac553fa11ee2da33a16deb2adf762322bb1abfded9b76c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64B2 7800 bytes

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