Malicious PDF — malware analysis report

Static analysis result for SHA-256 65a2292daa392c92…

MALICIOUS

PDF

90.2 KB Created: 2021-04-04 04:07:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 188de241c72e006be205e9e2b10de0da SHA-1: b1289a54c29b75bbf0d6ca0fefa89cab12acb78b SHA-256: 65a2292daa392c9205cd5b20eaefb54bf6e0f40bc7987fabd8fe6f97a1c60166
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

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://fokemale.ru/wix?keyword=geometry+chapter+2+quiz+1+answers PDF link annotation
    • http://xexapitanegis.getenjoyment.net/box_plot_interpretation.pdfIn PDF document text
    • http://avit0.pro/how_to_improve_english_speaking_fluency_at_homeb5lec.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/65029682335.pdfIn PDF document text
    • http://jisewuk.22web.org/lexoboxufivo.pdfIn PDF document text
    • http://nofipozi.22web.org/complications_a_surgeons_notes_on_an_imperfect_science_sparknotes.pdfIn PDF document text
    • http://profapp.pro/formaggio_bettelmatt_prezzo7pdhn.pdfIn PDF document text
    • http://discout.online/momaladametrcqb6.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/penopakejobukudulu.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_99df6b8ec08346bc8980d53a40d4624d.pdf?index=trueIn PDF document text
    • https://91953a53-6f32-4f2a-9b2e-0f954541ff31.filesusr.com/ugd/dad90e_a763bbd551de40778c6e7351bd3ab2e4.pdf?index=trueIn PDF document text
    • http://razebegapusej.rf.gd/toperukibepimuxo.pdfIn PDF document text
    • https://af8e4364-7f8a-45ec-af3e-d69da1c27fbb.filesusr.com/ugd/12c36c_81b350d6deda468d9ce9980f93d21f98.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nokiva/epic_conor_kostick_movie.pdfIn PDF document text
    • http://xizanisud.epizy.com/48349313454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/774a191f-47ba-453e-9a68-b9b9a81b44c3/47557538826.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a7c3d8-bf8b-4dd1-b4c9-01fcf7bf793b/fuzamobobuj.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/civ_6_joint_formal_war.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11857ac0-2b0d-4ee0-978b-f48d32064f3e/understanding_nutrition_facts_on_food_labels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b0f8d79-ee2e-441c-ba6d-0f143607f2e8/machine_learning_interview_questions_medium.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0001081f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1081F 21936 bytes
SHA-256: 2300af7fb9f8c78e2e6af1c2ee87ae9ea4a5e0b7dcd9d87bc184c5419f726fe7
font_00_sfnt_off0000f4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AA 5724 bytes
SHA-256: b8e091b41744e2d9616f945874e3c9e402bf03e3e2d4c5622da560e5409453a8
font_02_sfnt_off000135be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135BE 10520 bytes
SHA-256: 9400a205c6059e759031627615518291b20bbfc3a2200fae75c0021c660cf4af

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