Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c00b008fc1c8646…

MALICIOUS

PDF

77.7 KB Created: 2021-03-24 08:09:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1604b78fc00c6956116124cd4aa52599 SHA-1: db63a4e85b42c17d829a0133e156844b819fd8fb SHA-256: 6c00b008fc1c864695c2f394e27ad76551251a7cbe7ca83fbf7ef35cbbb2826e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('bologen.ru') that is likely used to host phishing content or distribute further malware. The document body, though heavily obfuscated, suggests a lure related to 'biotecnologia ambiental castillo rodriguez pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/award?keyword=biotecnologia+ambiental+castillo+rodriguez+pdf PDF link annotation
    • http://gbo.guru/feeling_words_that_begin_with_enc44cg.pdfIn PDF document text
    • https://cdn.sqhk.co/junukexad/ggid5Hp/5560635716.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/eCidias/balawafigibi.pdfIn PDF document text
    • https://cdn.sqhk.co/xugavizira/2Q8jeib/fast_and_furious_tokyo_drift_game.pdfIn PDF document text
    • http://leopards.space/zepanikoguvr47n.pdfIn PDF document text
    • http://pumba-timon.space/6082307420394w9p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d89a15f7-21b5-45f0-b9b4-bc5b7be68842.filesusr.com/ugd/18e821_2533ef26ff5a48ea84109fc7ca6ff648.pdf?index=trueIn PDF document text
    • https://c827806f-f9bf-4fd3-a4ce-e487c020fa79.filesusr.com/ugd/6fd45c_e47620ac493c47e9a2de4858fdc303bb.pdf?index=trueIn PDF document text
    • https://4f640d82-8365-4c22-93d6-dbd3427c3fb0.filesusr.com/ugd/55e8b7_b3e1dd924465434a8fd057edf30252f1.pdf?index=trueIn PDF document text
    • https://18cceff7-6d50-42ec-9d85-67184b61345e.filesusr.com/ugd/8c2e83_d74ee25a2b394588bc9fec0df6d59c96.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dec66fda-7bbb-4503-8aae-f0b6096d56fc/ritejim.pdfIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_6ed77b55f50c4fe4aebbceb9808fd85b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8428b3c8-55cf-46f0-b248-8fd6c8e879c8/beziwowuzamixel.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/tebilixifudevakek.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/malaguena_clarinet_sheet_music.pdfIn PDF document text
    • https://c78ffd2e-fc3d-4272-86ca-968d835fb7ad.filesusr.com/ugd/0f9ef0_29b3a6b67c4c4c1ba7dbfc90a43483c3.pdf?index=trueIn PDF document text
    • https://c75ed97e-f406-4d79-b864-c99612e64be8.filesusr.com/ugd/a66d15_4880ebcce356485abb4c7abe87150f39.pdf?index=trueIn PDF document text
    • https://6acbaf94-bc62-4fdb-9a00-914544f0b606.filesusr.com/ugd/3ee118_ea2cdc13567745e0ad33f214405b251c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/setigafat/58684824928.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_off0000ee61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE61 5716 bytes
SHA-256: af05ec8702c7c4e0bc8c7fd1f40e8a93e39d2a5069382e89383f0cdb89fee978
font_01_sfnt_off000101c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C2 11544 bytes
SHA-256: b03cf755725412f98a30f384902f682224afdb96595155892ef582e82880ee69

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