Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c34a10e67740b10…

MALICIOUS

PDF

42.2 KB Authoring application: Smallpdf Desktop
MD5: be1d2b04da33f7ab55bca167c98d5556 SHA-1: 9ba4716b58fdd798fd7a2971e512f27068114a1d SHA-256: 0c34a10e67740b10af93a80e7d74165bb06be1b3b1f6d63af28d60db80b0bc78
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The primary finding is a large number of embedded external links pointing to other PDF files across numerous domains, suggesting a link farm or a distribution mechanism for further payloads. No scripts were extracted, and the document body was heavily obfuscated, preventing a deeper analysis of the immediate user-facing 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://omimusic.xyz/uploads/1/3/0/2/130289002/71bd634a070.pdf
    • http://www.mysticaljourneys.net/uploads/1/3/0/6/130640194/3340230.pdf
    • http://carrouselmuseum.net/uploads/1/3/0/6/130620380/dememejavenanalaf.pdf
    • http://greshambankruptcyattorney.com/uploads/1/3/0/2/130287314/3442422.pdf
    • http://hangmyboard.com/uploads/1/3/0/5/130542755/4060316.pdf
    • http://eliteculinarychef.com/uploads/1/3/0/8/130874642/sovene.pdf
    • http://uchannel.info/uploads/1/3/0/2/130289722/e3ef5.pdf
    • http://peggymoranhorn.com/uploads/1/3/0/2/130272234/2815881.pdf
    • http://kristencathey.com/uploads/1/3/0/8/130814066/tojifaziluse_fasonowesowatol_kovikipemenamo.pdf
    • http://paolospazzini.com/uploads/1/3/0/7/130740324/4e2a983b12.pdf
    • http://nexgentestosterone.com/uploads/1/3/0/6/130639273/lunuwuje.pdf
    • http://breadhomedelivery.com/uploads/1/3/0/4/130483271/0c38d72ed7.pdf
    • http://clearhomesolutions.net/uploads/1/3/0/4/130490106/zesoto-bowatis.pdf
    • http://lifestylelimousine.ca/uploads/1/3/0/8/130874492/xuziw.pdf
    • http://jvwritingv4.club/uploads/1/3/0/5/130589064/xibabus-ratoro.pdf
    • http://dedrickenterprises.com/uploads/1/3/0/7/130776074/duzegamilirobi.pdf
    • http://thewitchsgarden.com/uploads/1/3/0/3/130323968/dirugogumopa-vidufuru.pdf
    • http://www.fineoriginalartwork.com/uploads/1/3/0/7/130775710/bofaraxo_wofujeza_luked_wavakiti.pdf
    • http://radissonbluhotelkigali.devsite-1.com/uploads/1/3/0/6/130639177/130639177.html#autocad+convert+pdf+to+dwg+2017
    • http://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000034ab.bin
0b8a478ffcfea661941d543969a01bd1ce8a832b35fc5fe5d75b5129e9bdb553		 pdf-font-stream PDF embedded font (sfnt) at offset 0x34AB 8992 bytes
font_01_sfnt_off0000520d.bin
afd8868629b61d85ec32a8a0de1ca84da82d48156cdd7447d7c4f51403cf5149		 pdf-font-stream PDF embedded font (sfnt) at offset 0x520D 5244 bytes

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