Malicious PDF — malware analysis report

Static analysis result for SHA-256 42bca840c09eb733…

MALICIOUS

PDF

42.0 KB Authoring application: Mobipocket Creator
MD5: 3db42e9df5adf84bf137a7f634413a47 SHA-1: bd232b3a835f4a7e780b7fbdb5880d2a2c9a4f01 SHA-256: 42bca840c09eb733ce8a1baad1b794f6268373e3759c63a0cefe932c1f91e5c9
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF files hosted on various domains. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a malicious intent, likely related to phishing or traffic redirection. No scripts were extracted from this sample, and the document body primarily contains technical terms related to PDF creation and medical case reports, which appear to be obfuscation for the embedded links.

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://michaelrekas.com/uploads/1/3/0/3/130379458/nutozigag_vodigam_wajatezirutit_jitubumad.pdf
    • http://colormefitmd.com/uploads/1/3/0/5/130545199/2b9a1a9af7c22.pdf
    • https://jarofozizad.weebly.com/uploads/1/3/0/2/130272892/ffe2431.pdf
    • http://mylectro.com/uploads/1/3/0/4/130475980/5143f73.pdf
    • http://retumete.sacocompany.net/uploads/2020/01/29/1949728.pdf
    • http://no-such-thing.org/uploads/1/3/0/6/130620340/10986bf05c45.pdf
    • http://cetlgroup.org/uploads/1/3/0/3/130323642/1261714.pdf
    • http://nataliefernadez.com/uploads/1/3/0/2/130271081/fewujegapixunep.pdf
    • http://zoomquest.net/uploads/1/3/0/6/130604981/4491641.pdf
    • http://nomadicwellness.com/uploads/1/3/0/5/130588976/jorodadudijudu.pdf
    • http://ozhiking.com/uploads/1/3/0/5/130551654/6828007.pdf
    • http://kubulo.audiostart28.icu/uploads/2020/01/29/tedozi.pdf
    • http://oakislandhomeowners.org/uploads/1/3/0/6/130620874/segaxuviluwefo_rijojeremir_bilarebuf.pdf
    • https://fanadelonilavo.weebly.com/uploads/1/3/0/3/130313641/9903642.pdf
    • http://phantomofthepasta.com/uploads/1/3/0/4/130483757/vobuzogowujir.pdf
    • http://detroitfollowersofchrist.org/uploads/1/3/0/6/130604730/goputiloxo.pdf
    • http://radioteleunite.com/uploads/1/3/0/3/130313434/fd89f4630bf26.pdf
    • http://dar.kiamotors.md/uploads/2020/01/27/e08b336aa503.pdf
    • https://fokeronapafij.weebly.com/uploads/1/3/0/4/130477394/vumemivumu-wetem-wegafana-fexegap.pdf
    • http://mywebcheetah.com/uploads/1/3/0/6/130605077/ddf2cb5.pdf
    • http://monstermaniagame.com/uploads/1/3/0/4/130477372/jiwoxi.pdf
    • http://newmarlboroughfiber.org/uploads/1/3/0/6/130639934/vuliboguzedur.pdf
    • https://riralikatuxu.weebly.com/uploads/1/3/0/3/130323116/tovogusu-suwanef-sobabesukejen.pdf
    • http://beyondhillco.com/uploads/1/3/0/5/130551589/130551589.html#hydatid+cyst+liver+case+report

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001712.bin
064a50d070e91b1dc5a72e283b0b782237e664010c9465eefa5b09ac21a0038b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1712 8812 bytes

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