Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfb02df1b7b7a8eb…

MALICIOUS

PDF

73.8 KB Created: 2021-03-10 09:55:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc9124f3aa94772ce8d97b9f567fbadb SHA-1: b0cddec451d6125e4d45c9da3df1de93e59c82c8 SHA-256: dfb02df1b7b7a8eb59001c72e7be6e5473172edfe9f2b76b8e5906d61e3e7007
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are dynamically generated and point to PDF files, indicating a link farm or SEO spamming technique. The primary URL suggests a lure related to resetting a DirecTV receiver, likely to trick users into clicking malicious links. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://pelibifir.ru/strik?utm_term=how+to+reset+directv+genie+receiver
    • https://gilepijojuju.weebly.com/uploads/1/3/2/7/132740412/rogimir-vikebevuvabosab-waguvi-dikisekile.pdf
    • https://kezofufilulo.weebly.com/uploads/1/3/4/4/134488682/diguruluze.pdf
    • http://avto-trokot.xyz/48586556965iz6dt.pdf
    • https://gatokoliza.weebly.com/uploads/1/3/0/7/130739470/lamav-buzedakulowefat-lalewo.pdf
    • http://talakam.space/16008352947h9e3c.pdf
    • https://femovoba.weebly.com/uploads/1/3/0/7/130775826/99eeb.pdf
    • https://ropexosuwewi.weebly.com/uploads/1/3/1/3/131380205/pemab-sirudeb-petebonisazafap-mizipukobup.pdf
    • https://lexezidelaxo.weebly.com/uploads/1/3/4/6/134605078/bodokuzewaxa_jaluferowo_ronubezuxe.pdf
    • http://detonic-romania.website/romeo_and_juliet_love_or_hate_essayq4kfz.pdf
    • http://1eyvgo.xyz/waworedixejejaloxovih4ui1.pdf
    • https://kisimerib.weebly.com/uploads/1/3/4/6/134697331/3364738.pdf
    • https://xajakubadom.weebly.com/uploads/1/3/0/8/130874473/kejagevovu.pdf
    • https://dinuboxisoxim.weebly.com/uploads/1/3/1/8/131857966/3187760.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dawiwafawuz.epizy.com/dakipofijak.pdf
    • https://s3.amazonaws.com/mamibis/36568803522.pdf
    • https://s3.amazonaws.com/vanatul/microsoft_licensing_guide.pdf
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_3b19de0370b548c8ab92c4565571920a.pdf?index=true
    • https://s3.amazonaws.com/wujixus/epson_artisan_710_a_printer_error_has_occurred.pdf
    • https://790985df-dfec-4a08-b509-00f37668cf87.filesusr.com/ugd/a421e3_1a8547b5e7084fde833ee69320f4d963.pdf?index=true
    • http://tisenunab.rf.gd/convert_bose_sounddock_portable_to_bluetooth.pdf
    • https://s3.amazonaws.com/tujeviwakirawu/xabira.pdf
    • http://kobuxotaregudes.rf.gd/gazixosuzobe.pdf
    • http://palalujopaxuv.epizy.com/15294506383.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3f7.bin
0840e151d049fd596d9ed88cf52ab17d4790973ced60c17fd55885c529dd0e65		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F7 4976 bytes
font_01_sfnt_off0000f50f.bin
a7cd404972350b6765b9da123f93d2e6562f62c8f77e7b97427538d4ce088c6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF50F 10744 bytes

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