Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b18611b05eb3ec8…

MALICIOUS

PDF

73.9 KB Created: 2021-05-08 05:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d4c937faebb55a60a4c61162b02aedc9 SHA-1: d68791c510978e2cac0a465cf64e09495f309dcd SHA-256: 6b18611b05eb3ec867e0b4c7b327e9eb6bbea0e3bc9ce99b5cb35189e543f828
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many of which point to SEO-optimized PDF farms, suggesting a phishing or malware distribution scheme. The primary lure appears to be a movie trailer, directing users to a suspicious URL. ClamAV and ML classifiers also flagged this file as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://fokemale.ru/strik?utm_term=percy+jackson+and+the+sea+of+monsters+trailer PDF link annotation
    • https://butiriretife.weebly.com/uploads/1/3/2/6/132681404/7070553.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370294/normal_6067feeca6ae3.pdfIn PDF document text
    • https://cdn.sqhk.co/tuponapalab/gjghicR/chocolate_protein_shake_recipes_healthy.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/Qghqhjn/crazy_golf_open_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/jetirivotu/Rgcogii/brimstone_haunt_psychosis.pdfIn PDF document text
    • https://mowofagafuvu.weebly.com/uploads/1/3/4/5/134594922/4220478.pdfIn PDF document text
    • https://cdn.sqhk.co/tifozeborot/h9gBslC/guvimubabotobefixuv.pdfIn PDF document text
    • https://cdn.sqhk.co/takularozo/a5gehjR/10857941973.pdfIn PDF document text
    • https://sekikeke.weebly.com/uploads/1/3/4/7/134739811/9954451.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/zJztchc/xixukekuporagewinofiliv.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/BMkjfbF/world_craft_new_crafting_building_2020_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/wituruxa/hiDifAp/soccer_kicks_strike_mini_flick_football_games_3ds.pdfIn PDF document text
    • https://cdn.sqhk.co/boxewemutox/MhegeQm/felamemivulabutuzipejorev.pdfIn PDF document text
    • https://voxalasodakuro.weebly.com/uploads/1/3/4/0/134042561/915336.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_604f832097eb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427287/normal_6012ede039353.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jigezilor/suguluk.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/best_business_books_2018.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE173 5504 bytes
SHA-256: 74e744c629e51c0e9e48d230d8cd9496a66fe9c55802e3860309b6a2b56ec44b
font_01_sfnt_off0000f411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF411 10676 bytes
SHA-256: a069e8fed6adb06d83750e71342fd6dae369b2334a95a7bdb5a7760dcf8da2df

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