Malicious PDF — malware analysis report

Static analysis result for SHA-256 2742ac51768acd17…

MALICIOUS

PDF

42.7 KB Authoring application: Karbon
MD5: ee82324f1b75ac892abbd88530f0b6a5 SHA-1: 6ef87716136321c78cdc114d59758c8dd0a1e617 SHA-256: 2742ac51768acd17255eed3d557a6ce7cf0a3ff35a6cf015ed38d69e40d36cf4
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and a machine learning classifier, as malicious. The critical PDF_SEO_LINK_FARM heuristic indicates the presence of a large number of embedded URLs, with 'jens-kemper.net' being a dominant host. These URLs likely lead to phishing pages or further malware downloads, aligning with the 'Pdf.Phishing.TtraffRobotInstall' detection. No scripts were extracted from this sample.

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://jens-kemper.net/uploads/1/3/0/5/130551749/4168557.pdf
    • http://14weekends.com/uploads/1/3/0/4/130435701/sumiw.pdf
    • http://kovry-angora.ru/uploads/2020/01/27/dukuxofumevitos-vugiwoto.pdf
    • http://amommachoosingjoy.com/uploads/1/3/0/3/130323115/jerafugebi.pdf
    • http://multimodalresearchteam.com/uploads/1/3/0/6/130639321/52978113d17336f.pdf
    • http://afterall-this.com/uploads/1/3/0/5/130590215/9925d.pdf
    • http://tiny-warriors.com/uploads/1/3/0/3/130313590/8683491.pdf
    • http://myflowshop.com/uploads/2020/01/28/wovezowowobopetu.pdf
    • http://brittanygrahamrealestate.com/uploads/1/3/0/4/130483249/kupam.pdf
    • http://100places.de/uploads/1/3/0/3/130313145/ritubapinonuj_suduxasenuzija.pdf
    • https://todibarura.weebly.com/uploads/1/3/0/4/130483290/8cb5116a5666.pdf
    • http://jov.evrodom.icu/uploads/2020/01/27/74a72.pdf
    • http://flooks.ru/uploads/2020/01/28/9b74d5be539.pdf
    • http://xas.laritelle.org/uploads/2020/01/28/3c73af86c48b.pdf
    • http://kefinancialservices.com/uploads/1/3/0/2/130289580/2d589a.pdf
    • http://landmarkenglish.opole.pl/uploads/1/3/0/6/130621351/gizosig.pdf
    • http://dimixekem.suppasides.win/uploads/2020/01/27/fivifar_bikoxamalu.pdf
    • http://halogroupinc.com/uploads/1/3/0/6/130620672/8124454.pdf
    • http://whynotourcity.com/uploads/1/3/0/6/130621013/6cc7bc84b08.pdf
    • http://mynorahaze.com/uploads/1/3/0/6/130639632/1566238.pdf
    • https://zibebuwividopu.weebly.com/uploads/1/3/0/5/130590392/puzasifodevusabo.pdf
    • http://globalhealthhighschool.org/uploads/1/3/0/6/130603740/2d5f6f279.pdf
    • http://gbpfinancials.com/uploads/2020/01/27/1481952.pdf
    • http://suredoneservices.com/uploads/1/3/0/2/130288430/nugosuwir.pdf
    • http://hello-baby-toys.com/uploads/1/3/0/2/130272501/130272501.html#acer+nitro+5+i7+8750h+undervolt

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000016d3.bin
ea96ed6b72b2cc25f5b5c3b350ac0f379c8fe515675a8a91ba78912cd10ff98b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16D3 8692 bytes
font_01_sfnt_off00006aec.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AEC 2652 bytes

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