Malicious PDF — malware analysis report

Static analysis result for SHA-256 925500771c225627…

MALICIOUS

PDF

72.7 KB Created: 2021-04-25 21:21:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2609b3cf7d88912f6659fde3072fcd23 SHA-1: a05f6b16c2a1ca7b3fb1a509c365b1627c013f07 SHA-256: 925500771c2256279ec8f04713f11c103d718750841dc18eb927926d65aa7083
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 trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to educational content ('absolute value inequalities worksheet doc').

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://maypoin.ru/strik?utm_term=absolute+value+inequalities+worksheet+doc PDF link annotation
    • http://wafelizoxekar.iblogger.org/convertible_notes_on_balance_sheet.pdfIn PDF document text
    • http://idealicaufficiale.website/vrse_batman_vr_entertainment_systemohdri.pdfIn PDF document text
    • http://cashtanks.fun/784218171979h4fc.pdfIn PDF document text
    • http://bamiluzigu.mygamesonline.org/how_do_i_love_thee_let_me_count_the_ways_wikipedia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_b3b24b39027a4d03a747add6293e007d.pdf?index=trueIn PDF document text
    • https://aa35d63c-0e5a-4861-819d-89a6a6fbb433.filesusr.com/ugd/3283b0_14230fc9315e4a36b7e214dab1e6174b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/paropabaru/28775208108.pdfIn PDF document text
    • https://7c5e2310-e79b-429e-9f4a-70471a43dcce.filesusr.com/ugd/8ec1ef_5f1a4d0ff5f248378931c46713d05768.pdf?index=trueIn PDF document text
    • http://bidadefaj.epizy.com/xitesotikenurizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a25454f-9923-46d1-8819-9f3d6238eed8/kidipix.pdfIn PDF document text
    • https://f0ddeb88-3549-4a27-8821-6e3dd713f165.filesusr.com/ugd/2b74da_292fd2daa9c34483980e97a12ee9ac9f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b62d9d6-1922-48e0-b893-9e5eccb9b460/prepositional_phrase_worksheet_grade_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81d2f0db-dfc1-4845-b9a3-51044abbe7c7/ferinok.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/cbse_guidelines_for_class_12_exam_2019.pdfIn PDF document text
    • http://solamimopeze.epizy.com/learn_russian_podcast_beginner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64622364-c3a8-47e9-8ec9-769167b202c0/honeywell_thermostat_display_not_working_after_battery_change.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/delegation_of_authority_format.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/what_the_best_college_teachers_do_ken_bain.pdfIn PDF document text
    • http://wemaxoseni.myartsonline.com/voribokuwalimo.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/solidworks_2010_cswa_exam_preparation_answers.pdfIn PDF document text
    • http://tizidirek.rf.gd/latest_bollywood_movies_hd_free_2019.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_off0000dc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC02 5500 bytes
SHA-256: b49d2ca022214c7b93db13280b48854aa886e895aef52eb11a1341d361d96a0a
font_01_sfnt_off0000eeba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBA 10756 bytes
SHA-256: 5b919b492effbec96374616c4ba952a4d51df6cc70c5892a200fa823e1065706

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