Malicious PDF — malware analysis report

Static analysis result for SHA-256 852d5b5372e252ac…

MALICIOUS

PDF

29.8 KB Authoring application: Karbon
MD5: aa6fc63a53caed9cd8762d95373fe26f SHA-1: 59ab65bc846ed0d46019c53b566244fe8c2d1269 SHA-256: 852d5b5372e252ac2efcf4e3644ea01425ff681ea98ee3b411ef2ded649bd6b1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs pointing to other PDF files across various domains, a technique often used for SEO spam or to distribute malware. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the 'PDF_SEO_LINK_FARM' heuristic strongly indicate a malicious intent related to traffic redirection or phishing. No scripts were extracted from this sample.

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://northdallasepilepsy.com/uploads/1/3/0/2/130272356/b4895fa006.pdf
    • http://powerbabes.net/uploads/1/3/0/3/130379226/tekurir.pdf
    • http://cesartechnologiesltd.com/uploads/1/3/0/5/130588856/3039160.pdf
    • http://desertside.com/uploads/1/3/0/5/130541271/rotodakevojafeza.pdf
    • http://coastalchurchmaine.com/uploads/1/3/0/6/130639462/viviludozaf-kavikimoxeve-kevaruze.pdf
    • http://www.mywealthylife.org/uploads/1/3/0/8/130813553/bomava_tidex_gekurupovaluz_mopunuzonepojom.pdf
    • http://bikeshop.gettysburgbicycle.com/uploads/1/3/0/5/130551342/5595525.pdf
    • http://kbcelevate.com/uploads/1/3/0/8/130813898/kuparulirazikum.pdf
    • http://bigislandeventrentals.com/uploads/1/3/0/3/130323298/756002.pdf
    • http://blingamabobs.com/uploads/1/3/0/6/130604264/c5b871.pdf
    • http://sinmaps.com/uploads/1/3/0/4/130436071/jefavulubepodomapus.pdf
    • http://ipraymovement.com/uploads/1/3/0/5/130542727/55c8657c875a.pdf
    • http://aquestbegins.prayerknight.com/uploads/1/3/0/6/130605312/8175080.pdf
    • http://digitalvitaminagency.com/uploads/1/3/0/2/130289524/kipemesovoval.pdf
    • http://www.amityvilleroofing.com/uploads/1/3/0/7/130739705/2663484.pdf
    • http://nrvikingspiritwear.com/uploads/1/3/0/5/130590375/3893725.pdf
    • http://ttthardstyle.com/uploads/1/3/0/2/130274282/130274282.html#libro+de+patologia+robbins+9+edicion+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001a72.bin
69877b32d35b289b57ca480bc693e3e04c2103147e59fc969efb41f4646fc69f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A72 7488 bytes

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