Malicious PDF — malware analysis report

Static analysis result for SHA-256 012655b8369f9b19…

MALICIOUS

PDF

38.0 KB Authoring application: QPDF
MD5: eee08793ec04fdf64a60b45e844bfef3 SHA-1: 55818c3c6a9fdefb2a15fc3eedbba257311d7258 SHA-256: 012655b8369f9b191a8acd4e248028dd0845b139078d594de282f591edc4e9eb
152 Risk Score

Malware Insights

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

The PDF document is identified as malicious by ClamAV and an ML classifier, and it contains a large number of embedded external links. The document body, though partially corrupted, suggests a lure related to IELTS test materials, likely to disguise the malicious intent of directing users to a link farm. The primary attack pattern involves social engineering through a deceptive document title and the mass distribution of links to potentially malicious or spam content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://depsteinesq.com/uploads/1/3/0/6/130639786/ravopokomorilage.pdf
    • http://unfincableadventures.com/uploads/1/3/0/5/130551523/dovemudela-donusinuluwe-pivatenobena-relibuga.pdf
    • http://manexpacheco.com/uploads/1/3/0/8/130814531/6905639.pdf
    • http://nuobeijing.devsite-1.com/uploads/1/3/0/6/130604599/5940877.pdf
    • http://www.relief-at-hand.com/uploads/1/3/0/7/130739006/5575762.pdf
    • http://mta-sts.globaltrendmarketing.com.sg/uploads/1/3/0/6/130604787/76e8f267cc.pdf
    • http://ilgrandegiorno.com/uploads/1/3/0/3/130312925/bepoguwobedav.pdf
    • http://www.topthreespots.com/uploads/1/3/0/9/130969034/rinozubujilan.pdf
    • http://barkingwithbutler.com/uploads/1/3/0/7/130775511/sekuremepupu.pdf
    • http://mojofinancialservices.com/uploads/1/3/0/5/130551185/jakun-supuzasi-xetax-kisuwid.pdf
    • http://www.graciouscross.com/uploads/1/3/0/6/130639954/5466707.pdf
    • http://abullfrogstudio.com/uploads/1/3/0/8/130813504/mepuzedo.pdf
    • http://debudgetheer.nl/uploads/1/3/0/4/130483728/safojobirofizo.pdf
    • http://www.dieselgabon.com/uploads/1/3/0/4/130435892/7054477.pdf
    • http://jwallach.net/uploads/1/3/0/2/130271035/2111627.pdf
    • http://longviewgrange.com/uploads/1/3/0/9/130969742/raliladujitoniz.pdf
    • http://mountainviewconcreteco.com/uploads/1/3/0/8/130813834/fusoragusaxura.pdf
    • http://ridgerunnerdulcimers.com/uploads/1/3/0/5/130551103/rufak.pdf
    • http://stucampana.com/uploads/1/3/0/4/130483863/boxevewemedebinude.pdf
    • http://banminesusa.com/uploads/1/3/0/4/130488569/jisoziguwewutat_gigegak_bilorajulojige.pdf
    • http://frenchculinaryadventures.com/uploads/1/3/0/7/130775724/5770648.pdf
    • http://schrankmanufaktur-speiseder.eu/uploads/1/3/0/2/130288684/5790884.pdf
    • http://simonjohnsonproductions.com/uploads/1/3/0/4/130476298/6347710.pdf
    • http://certiorsupplements.com/uploads/1/3/0/5/130551262/130551262.html#achieve+ielts+listening+test+3+answer+key

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031ec.bin
5792149f9c74209daeb184069b6d729d5ff47f22ff6b622203a8e8139e8a5d7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31EC 7944 bytes

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