Malicious PDF — malware analysis report

Static analysis result for SHA-256 73e84d3895321b2a…

MALICIOUS

PDF

42.2 KB Authoring application: pdf-parser
MD5: 81646787d475d6f7c9e898be01540f37 SHA-1: dcd6bcf49c36d21355d5e535928eb39bcf56a8ac SHA-256: 73e84d3895321b2ac18aa10ecf6a8ef6ba993ad0c84cd7871d627457d44a395e
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to distribute further malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically identifying it as a phishing or potentially malicious distribution point. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kenmare-bayview-house.com/uploads/1/3/0/2/130287261/jufowuj.pdf
    • http://vowor.02shopppp.fun/uploads/2020/01/28/586a7ce41c74.pdf
    • http://dogfriendlyrentalsonsanibel.com/uploads/1/3/0/6/130620838/momol.pdf
    • https://vewogusit.weebly.com/uploads/1/3/0/2/130289668/fosoposekep_biguregojumeno_toxoseminepu.pdf
    • http://gotedavumu.pets-and-co.ru/uploads/2020/01/27/88def1f6508fc2.pdf
    • https://zunamofipipuxa.weebly.com/uploads/1/3/0/4/130489969/390bfe.pdf
    • https://kupirabupev.weebly.com/uploads/1/3/0/4/130488669/dokebu-vataronebixer-dogaw-zufiku.pdf
    • http://nysmaplepartridge.com/uploads/1/3/0/6/130604222/9022684.pdf
    • http://dozefex.davidnajaryan.com/uploads/2020/01/28/kibafiwarekovoxewago.pdf
    • https://tisejame.weebly.com/uploads/1/3/0/3/130323641/gozimawadilukidote.pdf
    • http://lexaroma.com/uploads/1/3/0/5/130546243/0d19c.pdf
    • http://homesalesandrental.com/uploads/1/3/0/2/130270966/bd612fc.pdf
    • http://ltchunting.com/uploads/1/3/0/4/130488580/sologikuretuser-wopof.pdf
    • http://kofatolof.ed-pro.ru/uploads/2020/01/27/f3ee6b78268dcd0.pdf
    • http://sportexpress.pro/uploads/2020/01/28/8991e8ce7f8.pdf
    • http://ciggysound.com/uploads/1/3/0/3/130379192/130379192.html#james+hardie+6mm+cement+exterior+cladding+sheets
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00005b7b.bin
a954f0f4707a7043b63eef75d3c5c66fcd48cda01c81cda12f37a0f4a74e8a31		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5B7B 16732 bytes
font_00_sfnt_off00001474.bin
7f8676d5c4ee74fda1e11fa3e38ff0c5db0eb41e5a6d85423e2c43e9804d6bcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1474 7880 bytes

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