Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d6125e8bb8fb46…

MALICIOUS

PDF

44.9 KB Authoring application: Nitro PDF First seen: 2020-09-24
MD5: c8bf85c2392e0a997e46d5fdb35557b8 SHA-1: c0afcfb9851fc3d803616861eaac993aa33c260b SHA-256: a2d6125e8bb8fb46f5bedbcc46bca233b27f6e3d4dcf468430bb0abe4a8bfafc
172 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. No scripts were extracted from this sample, and the document body was heavily obfuscated and truncated, preventing a deeper analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://gwc.basaltlibrary.org/uploads/1/3/0/4/130476492/gefusa.pdf In PDF document text
    • http://kayleighpeddie.com/uploads/1/3/0/5/130589123/9221164.pdfIn PDF document text
    • http://www.chickasawconnections.org/uploads/1/3/0/4/130476347/jorafolexakifu.pdfIn PDF document text
    • http://crafttherapy.net/uploads/1/3/0/8/130873918/jamafaxuw-datuzuze-lemiratufalaral.pdfIn PDF document text
    • http://mta-sts.tammi-kim.de/uploads/1/3/0/3/130313242/70b86.pdfIn PDF document text
    • http://www.wake2migrate.com/uploads/1/3/0/3/130380002/nulavuferos.pdfIn PDF document text
    • http://kelviron.co.in/uploads/1/3/0/6/130639699/0e8b76e.pdfIn PDF document text
    • http://www.heidihackford.net/uploads/1/3/0/6/130604517/metogojatokavumun.pdfIn PDF document text
    • http://www.campanellichoir.org/uploads/1/3/0/6/130620399/bazavebav_lazuj_rovepibigorun_tibibegovipad.pdfIn PDF document text
    • http://robotitechnologies.com/uploads/1/3/0/5/130541209/9902459.pdfIn PDF document text
    • http://mail.stewartvillesportsmansclub.com/uploads/1/3/0/7/130775527/5424686.pdfIn PDF document text
    • http://melaniesfoodblog.com/uploads/1/3/0/4/130436519/wexufozowigudurub.pdfIn PDF document text
    • http://nikaspaus.com/uploads/1/3/0/7/130739474/vovapiginida.pdfIn PDF document text
    • http://fix-ng.com/uploads/1/3/0/8/130814290/raruxot.pdfIn PDF document text
    • http://bnaiisraelnc.com/uploads/1/3/0/7/130776521/3296718.pdfIn PDF document text
    • http://cornerstoneinsuranceservices.com/uploads/1/3/0/5/130543402/zoxoke.pdfIn PDF document text
    • http://prolinelifepharmaceutical.com/uploads/1/3/0/6/130620788/pugibifelirujig_xonimijobo_sasawurafukesu_lugejikut.pdfIn PDF document text
    • http://www.fifipheromone.com/uploads/1/3/0/3/130323762/8678781.pdfIn PDF document text
    • http://www.oddbutterflies.com/uploads/1/3/0/3/130313087/6e844c.pdfIn PDF document text
    • http://www.silverdragoncrystals.net/uploads/1/3/0/7/130740086/bokikub-gevidusan-wodopujifaze-tosovol.pdfIn PDF document text
    • http://chickasawcasinos.com/uploads/1/3/0/6/130605015/wagorisatepozude.pdfIn PDF document text
    • http://xznlz5l3.brdge.org/uploads/1/3/0/6/130639672/130639672.html#using+cpctc+with+triangle+congruence+worksheet+answersIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33AE 16208 bytes
SHA-256: ebc0f33c3547a5c3cdb9ac5e07399e3015eee4509d4ebb579acecdb9806a949a
font_01_sfnt_off00004be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BE2 8756 bytes
SHA-256: 4f4b99f1fc807da3aa390283fc63d4ed18997ebd520d6cf16209f17fdac51e00

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