Malicious PDF — malware analysis report

Static analysis result for SHA-256 12867074f345fdc2…

MALICIOUS

PDF

89.3 KB Created: 2021-03-27 19:10:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 575eb3081cf0dc15d0752d6d150f61f3 SHA-1: 4ce86287741dfb24f96eece0c3daef697e4943e7 SHA-256: 12867074f345fdc28437bf84c09bdd575acd316deb121e986a155c43f1fb70d7
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with high confidence. It contains multiple external URIs, including one that appears to be a link farm on disposable hosting, suggesting a phishing or scam campaign. The presence of embedded URLs and the overall structure point towards an attempt to trick users into downloading further malicious content, likely disguised as a job biodata PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://soxebez.ru/award?keyword=job+biodata+pdf+download PDF link annotation
    • https://cdn.sqhk.co/buvaboda/geiijgG/invisible_ios_home_screen_icons.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/pn8wThi/90530391650.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/hhjfkhS/59460511813.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417806/normal_5fe5d46e7dd21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496812/normal_600fea4d38306.pdfIn PDF document text
    • https://muxavitegujun.weebly.com/uploads/1/3/1/6/131637584/7d484f6b0.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/TNKgfuA/25424808249.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370288/normal_6048397548732.pdfIn PDF document text
    • https://kazumole.weebly.com/uploads/1/3/1/4/131454435/kovebavejafuxa.pdfIn PDF document text
    • https://cdn.sqhk.co/zugivakizo/ihjdIEV/what_does_two_dots_and_a_dash_mean.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454287/normal_5fcb16de844fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xurixado/merogisujegexisisati.pdfIn PDF document text
    • https://c06d174a-caca-4ab2-b5a0-4525cd3135d4.filesusr.com/ugd/856cea_3e9d432c10bd44b6bdb9482db082e591.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/80c8340b-4c7e-4eb6-a851-8def01e7587c/whirlpool_washing_machine_instruction_booklet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a79e8aa8-1e15-4768-854f-4e1525319baf/spoken_english_classes_in_nugegoda.pdfIn PDF document text
    • https://7a9095e9-4ba3-4ff7-9406-a75d0382ce8a.filesusr.com/ugd/db93e9_54e49c03236a4848b78633da4b055b04.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazemi/agenda_template_google_docs.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/passport_canada_application_form_baby.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/causes_of_youth_unemployment_in_nigeria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd9efef5-6c8f-4bb0-85d6-9497fc46da35/what_does_air_flow_efficiency_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdd4eeaa-8ce9-48e1-b3c3-2b8d5daaeb13/naruto_volume_10.pdfIn PDF document text
    • https://fc59733d-949e-4df9-817b-fea2515c5cc7.filesusr.com/ugd/689329_deea265d93514b29951130846d34badb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c70e613d-18b7-4253-80f2-88a2948d0747/pride_and_prejudice_full_soundtrack_2005.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_off0001218e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1218E 4980 bytes
SHA-256: 70c27de35f8ce13912d0940f270b745dbb798519230eafbf2f48e5b0a162097b
font_01_sfnt_off000132a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132A8 10816 bytes
SHA-256: f5c0525db73c77d2e0aba790c1488aa35afa8f78766fcff3b671a5be0d54aa94