Malicious PDF — malware analysis report

Static analysis result for SHA-256 d19a9406fd0a4ab0…

MALICIOUS

PDF

44.8 KB Authoring application: Adobe PDF Library 9.0
MD5: bc103bd6de47312c4c28898433c29d4b SHA-1: cb31af4e0dde3ac1a4582c9a327ef38ea6f0623c SHA-256: d19a9406fd0a4ab015d54e387ee050cfa73f890de801fe09368aec3741a764bb
150 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, with a critical heuristic firing for a PDF SEO link farm. The primary URL, http://duga.ptk-soyuz.com/uploads/2020/01/28/c7db8abe71.pdf, is identified as a suspicious link. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body itself contains references to these links, reinforcing the lure.

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://duga.ptk-soyuz.com/uploads/2020/01/28/c7db8abe71.pdf
    • http://perfectmatchjewellery.weebly.com/uploads/1/3/0/4/130488964/8127770.pdf
    • http://americanfriendsofthefatherbashfoundation.com/uploads/1/3/0/5/130589246/seneva.pdf
    • https://gutepaga.weebly.com/uploads/1/3/0/3/130313466/xojakosar-daribivibidojob-loxarodulid-zazizimiw.pdf
    • http://lomijiratu.nikitpvv74market.ru/uploads/2020/01/27/kigoj_dananudu_momatibifon.pdf
    • http://usawholesaleleads.com/uploads/1/3/0/6/130621089/36306.pdf
    • http://rapod.gentlyhug.com/uploads/2020/01/28/7019005.pdf
    • http://puweler.ny2003.ru/uploads/2020/01/27/dezozikokod.pdf
    • http://datservo.tech/uploads/2020/01/29/6766963.pdf
    • http://beyondcleanmaids.ca/uploads/1/3/0/4/130435574/fuwuludajovofepesu.pdf
    • https://boluwixoliwuxuj.weebly.com/uploads/1/3/0/5/130544034/b46351ba.pdf
    • https://nebirowupiwowis.weebly.com/uploads/1/3/0/5/130588856/eed6b338600c.pdf
    • http://space2m.info/uploads/1/3/0/6/130621746/b79bcce.pdf
    • http://bap.pp-offer.info/uploads/2020/01/28/3ce55e0b.pdf
    • http://carpetlands.com/uploads/1/3/0/2/130289353/dabuk.pdf
    • http://mowu.mirpruzhin.com/uploads/2020/01/28/9791353.pdf
    • https://kisegoduretojor.weebly.com/uploads/1/3/0/4/130435842/4922679.pdf
    • http://feputesol.bikerpublic.com/uploads/2020/01/27/4d9a7799b83b8.pdf
    • http://couplefamilytherapyn16.weebly.com/uploads/1/3/0/6/130639699/b51dcfef02.pdf
    • http://nrdiamondclub.org/uploads/1/3/0/5/130589274/5954cb9ecac36.pdf
    • http://tofawumat.woltag.com/uploads/2020/01/27/9523768.pdf
    • http://pomu.masternode-sc.com/uploads/2020/01/27/07237652754567f.pdf
    • http://wrighttothepointacupuncture.com/uploads/1/3/0/6/130605146/1502686.pdf
    • http://colddiamnd.com/uploads/1/3/0/3/130379181/130379181.html#similar+triangles+worksheet+missing+side

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001722.bin
1dfe1e5d76258c5a14eefdcbce532f2ec28e1372433b05d38f4a66f3921a8817		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1722 8140 bytes
font_01_sfnt_off000066f7.bin
31ec8eb014c58752027026a387543b87571894b1f6e2d682ebb8679d513579e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F7 16300 bytes

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