Malicious PDF — malware analysis report

Static analysis result for SHA-256 8df185680cb1cb2c…

MALICIOUS

PDF

88.9 KB Created: 2020-12-27 03:31:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f5cfb25a8b00b1e69b196337d7794ff6 SHA-1: e988742e08ca8f4eeffc4bd2211f33fe32230b4c SHA-256: 8df185680cb1cb2c387ab00b55a015475064b94ad048f0526ba915375b0d432f
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded URL, https://trafficel.ru/aws?utm_term=frozen+2+trailer+music, is identified as the primary redirection point for this phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafficel.ru/aws?utm_term=frozen+2+trailer+music PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426409/normal_5fdf70b0d232f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470552/normal_5fc72568e90d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370092/normal_5fa3a307474e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370533/normal_5f9fe249d6ca9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d422f73f-b50e-473c-a6ec-571a9107cc1a/pazoxarugezoxinum.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/bajaj_geyser_price_list_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/winrar_full_crack_win_10.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/binary_numbers_to_decimal.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/i_am_not_alone_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/zifunexinujeweperol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8121b2ec-7fb0-4536-bed3-97d6ede3e5be/tejexajit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65316393-4b2c-47bd-8e53-82ae87f416f1/94458014897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/938a2a3e-ad4d-44a9-be7f-c958b1f94d77/santorini_grill_menu_mequon.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D8 6444 bytes
SHA-256: e8ac5c97b4222b14b05c49468aae435eab6d01b1b1e1bcea31f810b253a4c327
font_01_sfnt_off00010398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10398 3136 bytes
SHA-256: b72e556104a05f6d23430f724e78f57f88089ea5c5e77ba26bc923eef355408b
font_02_sfnt_off00010ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECD 5084 bytes
SHA-256: 2533211ab54201b2928bb85255e63067f991ddfa8249f54b4cbd8580eaaf2ea7
font_03_sfnt_off00012003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12003 11688 bytes
SHA-256: 55226ec8e175fc80534ce39d3804442eec1f57e3232e6abedd2a270f33b4b65e
font_04_sfnt_off000146cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146CF 6128 bytes
SHA-256: de7cd77d069192b6eb161bf3216f35de75d695314482f32e008ba1f250f3410d

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