Malicious PDF — malware analysis report

Static analysis result for SHA-256 7811848a2fbb0963…

MALICIOUS

PDF

75.4 KB Created: 2021-04-03 23:04:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 49fc399c574722e7ac4a2238e614a7a7 SHA-1: c597b1926eda07af37087c1f15e3a18a8d154626 SHA-256: 7811848a2fbb09635dce94fef2f243a3742787c8d1c9c232c7ea4aa416900598
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, using an image to redirect users to an external URL. The primary URL identified is 'https://jacksth.ru/award?keyword=agartha+the+earth+s+inner+world+pdf', which is likely part of a phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/award?keyword=agartha+the+earth+s+inner+world+pdf PDF link annotation
    • http://neip-forum.fun/dafagac1jk.pdfIn PDF document text
    • http://sacredname.ru/most_clean_sheets_in_football_historydvgp3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388835/normal_60689909a764b.pdfIn PDF document text
    • https://cdn.sqhk.co/livaxipovage/e5gggcs/35185253226.pdfIn PDF document text
    • http://asta-stroy.ru/zijowazolanerumez9v05r.pdfIn PDF document text
    • http://daravto18.ru/kodakugupovikuredino977q9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410731/normal_605d8e722c8c6.pdfIn PDF document text
    • http://damita.fun/airlift_movie_hd_720p_filmywapx8u4y.pdfIn PDF document text
    • http://lnstagram-helping.live/91179543030mwjs8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426813/normal_5fff97ad65751.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476445/normal_603e7df0a6b53.pdfIn PDF document text
    • http://zathkatow.xyz/17117147077yno89.pdfIn PDF document text
    • https://cdn.sqhk.co/turanexode/bMOichd/farming_simulator_14_download_pc_windows.pdfIn PDF document text
    • http://gedatidigog.sportsontheweb.net/30340905228.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/2fjdugc/candomble_religion.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/dubiditiginowo/14435985763.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/rpg_maker_mv_resource_packs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/whats_the_best_oil_to_fry_a_turkey.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/annotation_guide_ap_lang.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/new_year_shayari_image_2019.pdfIn PDF document text
    • http://kadoxosin.atwebpages.com/48454311977.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_off0000e6aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AA 5384 bytes
SHA-256: 66055c0019712d5c0ae79e2d68c191607e56eb7fefb12777a888126d3da9db32
font_01_sfnt_off0000f90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90B 11820 bytes
SHA-256: e1d7bb9381cf4d3db3dc47755e908608c5ff049196a6e09a7646894a00fbeba4

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