Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2fbf52abc645115…

MALICIOUS

PDF

75.5 KB Created: 2021-06-04 19:18:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 88562fac6f204034c2a20e63b3109f8d SHA-1: db0721116b9d1340e411bc991a395883532c7a67 SHA-256: e2fbf52abc645115cc25f54360397ba54361a65f09668c92105ba26f5437c614
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9995

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 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.
  • 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/123?utm_term=agri+annual+2017+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4492897/normal_60212ba7bcf82.pdfIn PDF document text
    • https://vinifobak.weebly.com/uploads/1/3/5/2/135298549/3c1e2.pdfIn PDF document text
    • https://wonidajubiput.weebly.com/uploads/1/3/4/0/134017859/a44fb.pdfIn PDF document text
    • https://jusemeki.weebly.com/uploads/1/3/4/5/134506960/1622585.pdfIn PDF document text
    • https://koledino.weebly.com/uploads/1/3/4/3/134332835/kalabawuxox.pdfIn PDF document text
    • https://lojawosexofiv.weebly.com/uploads/1/3/4/6/134636472/af022bb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_603740921d8fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380707/normal_605f0ca47a406.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/2871dedc-2962-40f1-aa5c-df9f8b158e67/sebexovuxamipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac0227c3-4771-4995-802e-e33823e3b035/how_long_does_it_take_to_get_drill_pay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/769007ec-3559-4e5d-b8dc-3400618de34a/math_puzzles_with_answers_for_adults.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ffee46a-88ae-47ca-94cc-444607cd77fd/ladovagupubamujalo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bee616ce-0c37-4e14-bbff-e17a3500de91/republic_of_doyle_season_5_episode_2_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/001d2380-dc09-4f65-a666-ef268ff46f07/shri_vishnu_sahasranama_stotram_in_hindi_mp3_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba1a457e-f18e-4cd9-89e6-ab8182ca9882/womojujolamidivazanodu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/207053bd-48f8-418b-8076-a30c47247ad5/english_b1_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e063843a-6920-432a-93b3-49cffe95a29c/how_to_reset_my_sony_car_radio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee49e376-6963-44d6-9baa-73b5843362cd/pevobulavowubomabogisuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea9dcb98-eb83-464b-9acc-8f24edea14b4/gesupos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22871fc0-4609-4e94-ba85-3535c438054e/64391744085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a905f7c2-ad40-4655-8420-68d4fc3d938f/jeux_de_cartes_regles_2_joueurs_facile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b96a6ee7-1446-4b35-857c-6324fabd52e6/toro_20331_drive_belt_replacement.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_off0000e83f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83F 5424 bytes
SHA-256: b1526e6df6680f9c859592de3bdd7595f7777f0fd9ba373fd4ca8ecf11994b04
font_01_sfnt_off0000fad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD4 11196 bytes
SHA-256: ebae5f068702613d7171025626f394c5b83ce0dd29fdcfd426cea46db3505867

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