Malicious PDF — malware analysis report

Static analysis result for SHA-256 079f542106059ed9…

MALICIOUS

PDF

50.6 KB Authoring application: LibreOffice
MD5: b4af86f8673770f680d69cc3dfaeb243 SHA-1: 241a5fc0f93d26756853dd4dbc7cc3b4dcba5477 SHA-256: 079f542106059ed9803b69c2cc963eeae5aede1f6d01d06bd401d05f80bcf131
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO spam or to distribute malicious content. ClamAV detected this as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', and a critical heuristic identified it as a 'PDF_SEO_LINK_FARM'. While no scripts were explicitly extracted, the nature of the embedded links suggests a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://pizigaze.avtotool.ru/uploads/2020/01/28/pujim.pdf
    • http://drcmullen.com/uploads/1/3/0/6/130604645/tusiginodi.pdf
    • http://firstworldnewpaltz.com/uploads/1/3/0/3/130324065/pipitulowo_zewesomurikixe.pdf
    • http://womens-news.ru/uploads/2020/01/28/xozezano.pdf
    • http://mobrizan.weebly.com/uploads/1/3/0/3/130313784/9dda45cabfbe.pdf
    • http://sophiascheffel.com/uploads/1/3/0/6/130621808/vezofa_keriv_kubaw.pdf
    • https://mimuwarelige.weebly.com/uploads/1/3/0/3/130323928/2116773.pdf
    • http://mrsjessinaanderson.com/uploads/1/3/0/5/130542773/6234307.pdf
    • http://newmanstage.com/uploads/1/3/0/6/130605432/7743730.pdf
    • http://gexolob.cityglush13.icu/uploads/2020/01/27/divukowota.pdf
    • http://actorheadshotphoto.com/uploads/1/3/0/4/130478163/5d8fbdd094f5.pdf
    • http://culebrasailingcharters.com/uploads/1/3/0/6/130604344/3741051.pdf
    • http://lofiz.longislandremoval.com/uploads/2020/01/27/91aca0b0e.pdf
    • http://kevefipu.nickel-logine.com/uploads/2020/01/28/8597299.pdf
    • http://advance-it.net/uploads/1/3/0/5/130541881/130541881.html#ten+commandments+list+niv

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010a8.bin
53d8167ceff61acaeedc358f3f14f5b4691b53d497a993158c1f87e209bdb102		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8 8216 bytes

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