Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c28ba71afd587bb…

MALICIOUS

PDF

62.4 KB Authoring application: Pdftk First seen: 2020-09-24
MD5: dcac54c19cf6d28dfb15ff06a1b4963a SHA-1: 3cf7c7c770aa4e12903197f3cceb97f0e6ab10dc SHA-256: 7c28ba71afd587bbfce038c096185b26148d04a4472b62e7d9380d4e395c60ca
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by multiple engines, including ClamAV and an ML classifier. It contains a large number of embedded URLs pointing to other PDF files, suggesting a link farm or SEO poisoning tactic. The PDF structure itself does not contain readable content, but the embedded URLs are the primary indicators of malicious intent, likely to redirect users to malicious sites or distribute further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://tulatech.com/uploads/1/3/0/6/130621703/boxuwigujoj-julafekagub-paxixa-jinen.pdf In PDF document text
    • http://rootstogrow.com/uploads/1/3/0/5/130588499/nojerikojolel.pdfIn PDF document text
    • http://wordofthecrossministries.com/uploads/1/3/0/2/130287930/fezirubuwobujebabifu.pdfIn PDF document text
    • http://ns1.borkadancer.com/uploads/1/3/0/5/130550836/bowodewuxezoxov-zimirateni-fiporufo.pdfIn PDF document text
    • http://personalinjurylawyer-calgary.com/uploads/1/3/0/7/130776239/bogunivo.pdfIn PDF document text
    • http://enticionote.com/uploads/1/3/0/6/130604656/lopizopugejukix.pdfIn PDF document text
    • http://btlcoregon.org/uploads/1/3/0/8/130813546/fokiro-zulinebodul-meruw.pdfIn PDF document text
    • http://honda-va.com/uploads/1/3/0/5/130589216/2936589b166c9b2.pdfIn PDF document text
    • http://www.themaidstonemarch.com/uploads/1/3/0/6/130604324/dajulo_mawizejiwipu_xizaxinupaj.pdfIn PDF document text
    • http://onlythedrops.com/uploads/1/3/0/4/130476215/rogonebamuju_nanewugeg.pdfIn PDF document text
    • http://juliepearlman.net/uploads/1/3/0/4/130436298/gewawug-xadubo-mesofuk-gozibepomiguxe.pdfIn PDF document text
    • http://officialbrookekelly.com/uploads/1/3/0/5/130539840/loxitawog_subibukaxines_tiweberovov.pdfIn PDF document text
    • http://engpossible.com/uploads/1/3/0/4/130483294/7561156.pdfIn PDF document text
    • http://metroprointeriors.com/uploads/1/3/0/7/130738831/juxuvulovowapimirewe.pdfIn PDF document text
    • http://www.ag-fashionagency.fr/uploads/1/3/0/7/130776204/lamiremovo.pdfIn PDF document text
    • http://partypalscharacterrentalllc.net/uploads/1/3/0/7/130776810/6363854791.pdfIn PDF document text
    • http://ncmodern.com/uploads/1/3/0/5/130539763/zekegivo.pdfIn PDF document text
    • http://theelfbox.com/uploads/1/3/0/9/130969835/130969835.html#cholera+ppt+2019In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
🗂 Part of campaign: hiung.net 8 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000015a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A2 8780 bytes
SHA-256: 32a56a37e879352edddc147b8ed1098dc0c8a4c05565513226d1eaa9f98d2365
font_01_sfnt_off0000baa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA1 2600 bytes
SHA-256: 41d5c9cb4d60b7530e3cfd93a78efd430fe179aa57a8296e74fb8a971da4b0ee