Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d7409b9f34e447e…

MALICIOUS

PDF

74.9 KB Created: 2021-03-25 05:37:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: befdc7e63405f05500c733edf091137d SHA-1: dfa3ce40865be637b3b53bbb5aee0cde3897647f SHA-256: 8d7409b9f34e447e028c6ac1eb157ce9926831edcf1094b236d42e1a5c639a72
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dafemum.ru/wix?keyword=phalogenics+natural+method PDF link annotation
    • https://minizaderi.weebly.com/uploads/1/3/4/3/134344024/bimemiwatexufix_rojavulanos.pdfIn PDF document text
    • https://cdn.sqhk.co/tobijoge/Vjbxpp8/letelositirulin.pdfIn PDF document text
    • https://cdn.sqhk.co/jekurona/dhifowK/big_bang_entertainment_pakistan_owner.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwowamuxodo/iggflgg/atif_aslam_coke_studio_new_song.pdfIn PDF document text
    • https://pirusamu.weebly.com/uploads/1/3/1/3/131383726/mibepeka.pdfIn PDF document text
    • https://cdn.sqhk.co/mumeriretepi/Mjcjjg6/cup_cake_box_design_for_wedding.pdfIn PDF document text
    • https://vimumigejanamim.weebly.com/uploads/1/3/4/6/134619591/37bd1482b8.pdfIn PDF document text
    • https://cdn.sqhk.co/rufopunuk/l9IYig7/41637796569.pdfIn PDF document text
    • https://cdn.sqhk.co/tojebaru/idIhhgc/jufivilafazorari.pdfIn PDF document text
    • https://cdn.sqhk.co/mawetadu/jdQjcjj/bunugiwi.pdfIn PDF document text
    • https://cdn.sqhk.co/dudumadopole/hbgjJia/fly_fishing_rod_types.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/jfjfpqQ/clavinova_cvp_809.pdfIn PDF document text
    • https://wavopotajulaja.weebly.com/uploads/1/3/4/6/134631105/2316872.pdfIn PDF document text
    • https://cdn.sqhk.co/nozedimasav/qjdjfeV/xeseronip.pdfIn PDF document text
    • https://cdn.sqhk.co/zevivovakok/ges3jjT/escape_game_lab_sentier.pdfIn PDF document text
    • https://cdn.sqhk.co/tatolodam/jdjfkgc/47201940043.pdfIn PDF document text
    • https://laxonetamaj.weebly.com/uploads/1/3/4/0/134096763/5314118.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9eff4bf0-55a5-42b9-a65a-250f23c32afd.filesusr.com/ugd/80978b_5d6c9f73a93a425595e6441d40f835f9.pdf?index=trueIn PDF document text
    • https://5d94d51b-2702-4b64-8df3-eadd022f3edc.filesusr.com/ugd/2ddd39_ac33f90e924a48919445307e556ed49f.pdf?index=trueIn 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_off0000e9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BD 5352 bytes
SHA-256: 0fd54ffe5509be1ffd35602b284bac3febd2121cfc2661ea0317b058dbef0435
font_01_sfnt_off0000fbc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC6 10292 bytes
SHA-256: f6b57c7e2b7e9eacb343b1c43c60488a3695da3644c092216944ef8f14dc87d5

Open this report in the interactive analyzer, or submit your own file for analysis.