Malicious PDF — malware analysis report

Static analysis result for SHA-256 b207cb25e0d1631c…

MALICIOUS

PDF

94.4 KB Authoring application: LibreOffice
MD5: dbd1b0943587f1376456a0f5ba2ea028 SHA-1: b4de43a7915cc1c826a6335d28813f054d3b5f73 SHA-256: b207cb25e0d1631cb9fee939b7903157b7e04dff508033def6de0d57ad4e6da8
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection tactic. ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports a malicious phishing intent. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to these external PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://doz.cosmixmovies.com/uploads/2020/01/28/fekavuturalolof.pdf
    • http://cutleryclubofamerica.com/uploads/1/3/0/5/130589389/7463458.pdf
    • http://zelibonup.recude.xyz/uploads/2020/01/29/modavomugimuf_jekumuti_zojireguroren.pdf
    • http://xamotopar.instareger.com/uploads/2020/01/27/243ed03c0c5dfb.pdf
    • http://staffordchamberofcommerce.com/uploads/1/3/0/5/130541209/sepifejadetinelu.pdf
    • http://naturestrace.com/uploads/1/3/0/5/130540097/c642d.pdf
    • http://nataliamcabrera.com/uploads/1/3/0/6/130639855/8372327.pdf
    • http://hiinvitational.com/uploads/1/3/0/6/130621880/9273558.pdf
    • http://mobile.streetsmartyouthproject.org/uploads/1/3/0/5/130538937/nisokorewamano.pdf
    • http://mezohenley.co.uk/uploads/1/3/0/3/130379317/benig.pdf
    • http://tuz.nxnext.pw/uploads/2020/01/28/3025606.pdf
    • http://adadintheraw.weebly.com/uploads/1/3/0/6/130620505/39b582c26a7c6ad.pdf
    • http://2003ebaenglandscotlandtrip.com/uploads/1/3/0/2/130273617/mafeletosunudogozake.pdf
    • http://litigatingforchange.org/uploads/1/3/0/4/130483866/zagawuxotali.pdf
    • http://krhphotography.com/uploads/1/3/0/6/130640020/2156130.pdf
    • http://buttrcream.com/uploads/1/3/0/3/130313585/7047228.pdf
    • http://southmeckhsptsa.weebly.com/uploads/1/3/0/5/130551303/5148560.pdf
    • http://triadmarketplacenc.com/uploads/1/3/0/2/130287514/afd22fabc489.pdf
    • http://sally-fox.com/uploads/1/3/0/2/130289711/gilir.pdf
    • http://nationalriskmanagementgroup.com/uploads/1/3/0/4/130476503/130476503.html#bertholletia+excelsa+pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off00012180.bin
18758f930c0781e44fd1b3fd9c029a820091838460a09b6dd72de3f9bed4ea13		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12180 20004 bytes
font_00_sfnt_off000013dd.bin
eeb16a7f00bc70d2b50f4ccbbf4c67708783e90d78131c67d0d9c6d45f88d0ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13DD 15300 bytes
font_01_sfnt_off0000ba07.bin
b57d0ace256dd49317633732b85afca82283f12f89905e5dfa588a3364a931d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA07 11288 bytes
font_02_sfnt_off0000d34f.bin
b408f080b5bdf39fb795308735cc1ca88b2e5c4327377341dd3314de744dd136		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD34F 9772 bytes
font_03_sfnt_off0000ec4d.bin
a8fa9c3849c4a825ba0316ca3f9cf6b86480f0aaecc2dc50176fcc2ab0b62b7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4D 8288 bytes
font_04_sfnt_off0001033c.bin
6028e915a8e9eea3f2ebd2dac451b8b89be2972aeb9e8cd5d124f88b6f0c136d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1033C 9252 bytes

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