Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef228e51e57b855d…

MALICIOUS

PDF

57.2 KB Authoring application: QPDF
MD5: f55122723d7ee821d33fd347093ca761 SHA-1: 040549e8ee878f365e940555960ad05c02fe80cc SHA-256: ef228e51e57b855dd3217bc0d1a2639553ae6c218d8f18bd488914c915622a21
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents hosted on various domains. This technique, identified by the PDF_SEO_LINK_FARM heuristic, is commonly used to distribute phishing content or redirect users to malicious sites. The ML classifier and ClamAV detection further support its malicious nature, flagging it as a phishing attempt likely designed to lead users to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kasselov.no/uploads/1/3/0/7/130740591/sigoriket-romamuninatusax-ledosirovu-zapiwidudirumog.pdf
    • http://ohsosouthernhandcrafteddesigns.com/uploads/1/3/0/7/130775378/cc26ad2e1f7bd1.pdf
    • http://lalogodesigner.com/uploads/1/3/0/5/130588834/7508561.pdf
    • http://mimiandjoel.us/uploads/1/3/0/4/130436204/rudow.pdf
    • http://www.haileymorey.com/uploads/1/3/1/0/131070483/dd68d155a.pdf
    • http://www.saltcityoracle.com/uploads/1/3/0/6/130605071/b31c7a4631ba.pdf
    • http://theblackwomensguide.com/uploads/1/3/0/3/130312923/pajejubaz-negodesu-tanuvabemagam.pdf
    • http://bigcreekgreenway.org/uploads/1/3/0/8/130813417/482896.pdf
    • http://justkidstalk.com/uploads/1/3/0/8/130814353/joriji.pdf
    • http://anjaliseries.com/uploads/1/3/0/3/130312986/retumepakuze-ratidogux.pdf
    • http://www.discoverancientwhirlow.co.uk/uploads/1/3/0/8/130813765/mexitarumojudapasozi.pdf
    • http://caitlinmorrison.com/uploads/1/3/0/6/130621119/ketezajuxatekojuwa.pdf
    • http://softwareanalyticscorp.net/uploads/1/3/0/4/130476204/sixotekilap.pdf
    • http://www.evolveracing.net/uploads/1/3/0/6/130604147/zafivakopalawegukam.pdf
    • http://nikkiallred.com/uploads/1/3/0/4/130476033/4664061863.pdf
    • http://katdar.net/uploads/1/3/0/7/130776478/nemivobuwata.pdf
    • http://mitacoponchos.com/uploads/1/3/0/6/130620454/muzojowabavepakilo.pdf
    • http://www.sea-of-infinite-possibilities.com/uploads/1/3/0/8/130874362/womosuse.pdf
    • http://linenandlimoncello.marriedmeakiwi.com/uploads/1/3/0/3/130379096/4002499.pdf
    • http://classciv.com/uploads/1/3/0/7/130738675/6575848.pdf
    • http://richmondvideoservices.com/uploads/1/3/0/5/130540619/zusokaxubakun.pdf
    • http://www.stripe-itis.com/uploads/1/3/0/3/130313484/mobunefez-jolir-gufabutokezakeb-gututuruwo.pdf
    • http://www.guidethemind.com/uploads/1/3/0/5/130588644/fuvivododavivanab.pdf
    • http://courtney-karr-se-1.rominastiebenphotography.com/uploads/1/3/0/6/130620585/130620585.html#resignation+letter+pdf+bangla

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000135d.bin
1a08dd11839a1e155485586be3c88a4360d648adaed567bee2d481d7d7a2d167
pdf-font-stream PDF embedded font (sfnt) at offset 0x135D 8692 bytes
font_01_sfnt_off00008e8a.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E8A 16036 bytes