Malicious PDF — malware analysis report

Static analysis result for SHA-256 70846ffd358bfd3c…

MALICIOUS

PDF

41.1 KB Created: 2020-03-10 12:51:53 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 45363bca3bd8212424c30bc43c585f11 SHA-1: 16be93ab91ac8be1338e09806f0ed03e2246b1db SHA-256: 70846ffd358bfd3c18d65918854b75ecd2c250573354b42585b952c7da05fe6e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely exploits a vulnerability or contains malicious content. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, suggesting a tactic to distribute further malicious content or engage in SEO spam. The embedded URLs are the primary indicators of malicious activity, likely serving as download sites or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.Dropper.Agent-9102186-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9102186-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.dragonspathacademy.com/uploads/1/3/0/4/130483118/130483118.html#minimum+average+variable+cost+equals+marginal+cost
    • http://heartandsoulbirth.com/uploads/1/3/0/7/130739144/f2cd6.pdf
    • http://webdisk.hmcl.hk/uploads/1/3/0/6/130620657/2385509.pdf
    • http://myncpl.com/uploads/1/3/0/5/130551374/kifisewitebo.pdf
    • http://rocketshave.com/uploads/1/3/0/5/130551212/pazuganuxatejujus.pdf
    • http://hthnails.com/uploads/1/3/0/2/130289736/zemofudadus.pdf
    • http://fltravelagency.voyagerwebsites.com/uploads/1/3/0/6/130603935/jagarodimimi_ranegotusaja_joxuxoxomomu_nexop.pdf
    • http://oregonabslearningstandards.org/uploads/1/3/0/6/130639781/fozusojasuxaluva.pdf
    • http://terratechwiki.com/uploads/1/3/0/4/130476747/tenedudijakuni.pdf
    • http://shipfree.me/uploads/1/3/0/8/130814516/tirokekurenugenuwed.pdf
    • http://michelziesecke.com/uploads/1/3/0/2/130273626/588f45f4b26.pdf
    • http://indigo-tube.com/uploads/1/3/0/8/130813896/jupasalijepe.pdf
    • http://www.jglasergifts.com/uploads/1/3/0/6/130639298/bb2a03.pdf
    • http://bodhimassagedarwin.com/uploads/1/3/0/7/130739922/18ff3.pdf
    • http://yesbyronbay.com/uploads/1/3/0/7/130775520/nudupugujum.pdf
    • http://statussphere.com/uploads/1/3/0/9/130969041/ditasarugukixi.pdf
    • http://myrole.finance/uploads/1/3/0/6/130603995/tajoxi.pdf
    • http://tehditistihbarati.org/uploads/1/3/0/5/130546136/cb14c7a7fc.pdf
    • http://dillonlockhart.com/uploads/1/3/0/4/130483205/gonorirafu-nemixatexedeja-modoxuke.pdf
    • http://iscebsga.com/uploads/1/3/0/3/130323612/xiregevalif-xibijajofilidij-mavunuzepobebi.pdf
    • http://thegirlfriendsnetwork.net/uploads/1/3/0/6/130621487/zivafu.pdf
    • http://bluetecbeacons.com/uploads/1/3/0/3/130323568/tobedokozu_zasiwotaxinakan.pdf
    • http://www.thenovasanctuary.com/uploads/1/3/0/2/130270967/fodalojusubagoj.pdf
    • http://www.theb-collection.com/uploads/1/3/0/2/130271072/gosul-xuvisiv-metekosazagak-kodolokolazuf.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007433.bin
29ce3e7c973b77c633e335f3ef9d8a0978014d45de090bba5a8a354f4383fa65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7433 8368 bytes

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