Malicious PDF — malware analysis report

Static analysis result for SHA-256 6995b31eb1729050…

MALICIOUS

PDF

76.0 KB Created: 2021-03-19 07:41:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5af87b3c02ebcdaaadb87a70866b9845 SHA-1: c9437be8715b1ca72cf3dfafa457c1ebb57ee02a SHA-256: 6995b31eb17290506991ef51ff1679f7a25a6691528e3b9901ef7bf3f94a8a6a
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection mechanism. One prominent URL, 'https://jottigo.ru/strik?utm_term=how+to+connect+hp+officejet+pro+8610+to+mac', is presented as a guide but likely leads to a malicious site. The PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=how+to+connect+hp+officejet+pro+8610+to+mac PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490725/normal_6035aee8eec30.pdfIn PDF document text
    • https://cdn.sqhk.co/felebamifuk/jijcVii/bewogigemopubera.pdfIn PDF document text
    • http://health2health.online/how_to_write_a_poetry_book_in_wordy4l4m.pdfIn PDF document text
    • http://copyrightprivacy.site/cabal_online_free_full_clientd08l2.pdfIn PDF document text
    • http://limaxinsto.xyz/what_are_some_examples_of_inferential_statisticsw7yi3.pdfIn PDF document text
    • http://qlemelest.online/dobokodagewaruysz6y.pdfIn PDF document text
    • http://price-list.moscow/vorojemoroparedupozutiv0txt.pdfIn PDF document text
    • https://cdn.sqhk.co/dulunukosep/gehIqii/cisco_asa_vpn_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467561/normal_604302079a467.pdfIn PDF document text
    • http://vnds-v.website/fovibeofal.pdfIn PDF document text
    • http://unonatur.space/monster_in_law_full_movie_watch_onlinexyb5d.pdfIn PDF document text
    • http://bluebadgeform.com/dirazonipanflxn.pdfIn PDF document text
    • https://cdn.sqhk.co/fagiseregu/bChc1jb/marshmallow_fruit_dessert_recipes_easy.pdfIn PDF document text
    • https://cdn.sqhk.co/rifarako/aVihe1O/lumilifijijeropiraju.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/hhPRJhf/the_office_quest_walkthrough_chapter_4.pdfIn PDF document text
    • http://akmurzina.com/78213716141tt50c.pdfIn PDF document text
    • https://cdn.sqhk.co/gasubapo/hpg9gdH/remez.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/cAVheGF/pupin.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/0edbd855-5cb2-466d-aa16-38840742e38d/70198690171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f85db87f-2039-409d-bf65-edc3cb064b06/bexovezuponuguzewex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/935b5f90-6b0e-40ea-b6b7-aae545d31cbb/21640108604.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_off0000eae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE8 5716 bytes
SHA-256: 7bd2365e2bb3e5c36d8688fe1d6759dd49cbf5552dba4a236215d6a8b600be95
font_01_sfnt_off0000fe56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE56 10544 bytes
SHA-256: 58fab5caa2a16cdb072e4de227bdce5798d74b9b1978fcfcd680244933e7d3d9

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