Malicious PDF — malware analysis report

Static analysis result for SHA-256 821d1364523a05c6…

MALICIOUS

PDF

85.4 KB Created: 2021-06-06 02:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e44c762263eb761739ebe3e477966b63 SHA-1: ce3a0b55f134137af4fe495b16d45a9fa11eb789 SHA-256: 821d1364523a05c6f37b72c2a19f8e2766c26a5de8ef34c3dde03a66049ce2cb
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://garglob.ru/pbw?utm_term=how+to+turn+on+pocket+juice+hand+warmer PDF link annotation
    • https://sijapuxojowul.weebly.com/uploads/1/3/4/6/134616399/nisapifevafa-sutebutumiw-menaj.pdfIn PDF document text
    • https://negijozizur.weebly.com/uploads/1/3/0/7/130775009/koletetawi.pdfIn PDF document text
    • https://napujokid.weebly.com/uploads/1/3/5/3/135339673/6980269.pdfIn PDF document text
    • https://menanolunum.weebly.com/uploads/1/3/4/7/134754058/zomowefisuzupa.pdfIn PDF document text
    • https://jebupamix.weebly.com/uploads/1/3/6/0/136098333/4456749.pdfIn PDF document text
    • https://jokonufukitis.weebly.com/uploads/1/3/4/3/134399540/mikirig.pdfIn PDF document text
    • https://nozezekotelipub.weebly.com/uploads/1/3/4/8/134883262/dudebemuzex_nojodu_sogero_sobozokuzako.pdfIn PDF document text
    • https://junimadegerozo.weebly.com/uploads/1/3/4/0/134096607/1261455.pdfIn PDF document text
    • https://rixolojujosu.weebly.com/uploads/1/3/4/6/134622111/mifelopuv-fuvanavageso.pdfIn PDF document text
    • https://femomupine.weebly.com/uploads/1/3/4/4/134458898/5963108c0.pdfIn PDF document text
    • https://vibajadulefunuk.weebly.com/uploads/1/3/0/8/130874079/9604232.pdfIn PDF document text
    • https://juwarojolajekol.weebly.com/uploads/1/3/4/1/134108785/3854681.pdfIn PDF document text
    • https://supeneti.weebly.com/uploads/1/3/2/8/132815050/1973234.pdfIn PDF document text
    • https://puxomesepose.weebly.com/uploads/1/3/5/9/135977076/zojurusa-zulowod.pdfIn PDF document text
    • https://faworufobideped.weebly.com/uploads/1/3/2/6/132682851/7519454.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/088ad952-c74e-4af6-930d-b364c1a698d6/pipakigenubati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff5d22d1-dced-428c-8a41-0d82d7c8bb93/17517326818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00754c83-0226-4651-89ea-82cc33d24653/47489848660.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/940caf63-1404-4d39-9eaf-4a8291405de9/emoes_inteligentes_tiago_brunet_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acd25b29-24aa-4e17-be47-5a62615e1a2b/how_to_use_ge_cafe_convection_oven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e8244f1-3b5b-433a-acda-a37631d9cc9f/32688712200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feecd382-e073-4aef-9421-0552e8686fe4/brown_bear_brown_bear_activities_for_infants.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ec181c4-ae45-4aa0-bdfb-52bce1b9459b/ejemplos_de_progresiones_geometricas_en_la_vida_real.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6f63123-d89e-4b95-912d-5dacc574c460/the_witcher_book_and_game_timeline.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
font_00_sfnt_off000103aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AA 5176 bytes
SHA-256: fdb39dd0fce4bda4c65261676d0b4c5fe750c5a577060db94971b77e17f51fa4
font_01_sfnt_off00011529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11529 10684 bytes
SHA-256: 7b814309a6f2c4d966baeaaf23738a1ab6a01093a296651b70ea35afd4362051
font_02_sfnt_off0001397d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1397D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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