Malicious PDF — malware analysis report

Static analysis result for SHA-256 041b31615f09ccb5…

MALICIOUS

PDF

31.2 KB Authoring application: PDFedit
MD5: ba18ce0f2b42179a93a5ab427060fbf6 SHA-1: 6185455765f9b51ab31a1b6498844f5c9a8f2026 SHA-256: 041b31615f09ccb5f8d64352880bf392a1828587b3086a296e27811f6d2047e6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, which is a common technique for SEO poisoning and distributing malicious content. The ClamAV detection and ML classifier further support its malicious nature. The embedded URLs likely lead to phishing sites or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://mahoneyhouse.com/uploads/1/3/0/5/130589123/2893427.pdf
    • http://mixanek.com/uploads/1/3/0/7/130739648/jurajikisixerew-kopif-kukekekime.pdf
    • http://empire23.com/uploads/1/3/0/5/130588220/83d0209f8e47.pdf
    • http://acadiaextracts.com/uploads/1/3/0/5/130588867/lagemofexe.pdf
    • http://myanalogworld.com/uploads/1/3/0/6/130620820/gisevekowunido-vevutup.pdf
    • http://myecns.com/uploads/1/3/0/6/130639273/6394206.pdf
    • http://smokebrushfoundation.net/uploads/1/3/0/7/130775320/xizuburunade-xuzekitinuzila-pojilok.pdf
    • http://mikesfamoussteaksandsubs.com/uploads/1/3/0/2/130289729/672337.pdf
    • http://squaretaper.info/uploads/1/3/0/4/130488498/633600.pdf
    • http://graysay.net/uploads/1/3/0/6/130639369/xexinetone-porerew-bofam-jazosovi.pdf
    • http://mypinktoys.com/uploads/1/3/0/5/130588267/b845fb073fc77.pdf
    • http://whichcredit-card.com/uploads/1/3/0/7/130739140/fiboseki.pdf
    • http://huangguanguojiyulehuisuo.br3h.com/uploads/1/3/0/6/130620674/130620674.html#large+isometric+dot+paper+to+print

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000245f.bin
6382d245118062172352f5d943dc27805742f817699eda4af2c709e3edde8125		 pdf-font-stream PDF embedded font (sfnt) at offset 0x245F 6960 bytes

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