Malicious PDF — malware analysis report

Static analysis result for SHA-256 77510cd6f114fdfd…

MALICIOUS

PDF

76.4 KB Created: 2021-06-06 04:22:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 262ae4ca0fa0cd266ba28f5734645af9 SHA-1: b690ad7d26fce147ac2593cbc464bf13dcdb395a SHA-256: 77510cd6f114fdfdcede5783baa168455b801980172cb8371e7b2f4d04052caf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'fokemale.ru' disguised as a Windows 7 activation toolkit. The PDF also functions as a link farm, directing users to various external sites, some of which are hosted on disposable domains, further suggesting a malicious intent to distribute malware or conduct phishing.

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/123?utm_term=windows+7+ultimate+activation+toolkit+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374847/normal_6008f29eda162.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454419/normal_606e51e483434.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367617/normal_6023f2e42d6dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458124/normal_6026fc498155b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372399/normal_5ff0be897cd4e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mibegenav.pbworks.com/f/jekuxijugono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ff52ab8-6b84-4ca4-b1b8-6ec65c93eac7/ed_sheeran_and_justin_bieber_i_dont_care_song_lyrics_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b67c2e33-4763-40be-9bfc-1caee8efa691/how_to_play_go_strategy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a5093ed-0fc7-4110-8e07-52ef0f222605/basic_electronics_components_in_hindi_download.pdfIn PDF document text
    • http://feteselulo.pbworks.com/f/xuxuvotimozajadexameregiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e25e979-5845-4c27-a8ba-2fb7b3526289/how_to_say_i_like_playing_video_games_in_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9879a640-3c39-4c2d-b700-abde915237ee/40108051572.pdfIn PDF document text
    • http://xodelow.pbworks.com/f/imyfone_lockwiper_registration_code_and_email.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf6285ad-c599-46ae-8506-97fedc2c24fa/how_to_bypass_iphone_passcode_without_sim_card.pdfIn PDF document text
    • http://polujare.pbworks.com/f/tikawukoneleba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d1944b8-cbc5-4eb9-a0f1-970c245609a9/can_you_lose_weight_with_p90x3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12b30ac0-18d6-4dc1-a609-a192b1115287/20567930550.pdfIn PDF document text
    • http://zudilazo.pbworks.com/w/file/fetch/144665838/50240514462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eab57cdc-4a0b-4acb-9d3e-232dac539145/lizinibozolewutobataxiri.pdfIn PDF document text
    • http://letonepamusi.pbworks.com/f/knight_rider_2008_movie_download_in_isaimini.pdfIn PDF document text
    • http://kevukimugo.pbworks.com/f/divofeki.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_off0000ecdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDB 5476 bytes
SHA-256: 9551729f8bba8efe03df643660c33a4faa50fbb8b6e9219bd46516d30d2698f8
font_01_sfnt_off0000ff89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF89 10900 bytes
SHA-256: 6791ca53517afd9d6e4338bbcc817f6a1e8d6d0109c26a41a981898954c12510

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