Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddf81ddb9b7083a1…

MALICIOUS

PDF

72.7 KB Created: 2021-03-29 19:45:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1e2d271551df8d916b07e42cb047b70b SHA-1: c6ee56bacd6c7565dc0b3023fd23af8b1881afab SHA-256: ddf81ddb9b7083a1db4abebfe15ecfb76096b126c2081f9240059e560dc71e91
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9993

Heuristics 4

  • 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://botokaw.ru/wix?keyword=jio+cinema+apk+download+uptodown PDF link annotation
    • https://sunanineriputa.weebly.com/uploads/1/3/2/7/132740954/e32a328.pdfIn PDF document text
    • http://rujisuki.mygamesonline.org/24973827339.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/98315604964.pdfIn PDF document text
    • https://kapebuzuzevasa.weebly.com/uploads/1/3/4/5/134587117/633e586f4.pdfIn PDF document text
    • http://kudusakepupa.sportsontheweb.net/which_machine_learning_algorithm_is_best_for_text_classification.pdfIn PDF document text
    • http://sejerodetupumil.medianewsonline.com/46704016561.pdfIn PDF document text
    • https://fepexugoroba.weebly.com/uploads/1/3/4/4/134469665/womaxam-sozop-vadedatixage-robeminajugexu.pdfIn PDF document text
    • https://godikifamubexi.weebly.com/uploads/1/3/4/6/134622632/c67f1845effb.pdfIn PDF document text
    • https://palobakuk.weebly.com/uploads/1/3/4/5/134523632/a29759.pdfIn PDF document text
    • http://toxusuzom.mypressonline.com/31218098820.pdfIn PDF document text
    • http://sevoxotedeki.medianewsonline.com/rikedinulofab.pdfIn PDF document text
    • http://sazulido.medianewsonline.com/nipatusuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xufolat.atwebpages.com/42042059215.pdfIn PDF document text
    • https://c370dac7-4848-4fa0-a6df-94361299e8ba.filesusr.com/ugd/fa6303_9101595dd46b472ab11cafb8830e2431.pdf?index=trueIn PDF document text
    • http://sufixis.myartsonline.com/31503166081.pdfIn PDF document text
    • https://73e25548-3913-4bbb-aa69-a1b25f69568d.filesusr.com/ugd/cece23_5224579484fe49e3aa518a412cc7decc.pdf?index=trueIn PDF document text
    • http://xejobutek.onlinewebshop.net/guwosalemukulatotivijaf.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/good_books_for_3rd_grade_guided_reading.pdfIn PDF document text
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_957ed086c975416ebb289029fa5a3dfa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jovekus/bimunux.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/pandora_bracelet_size_guide.pdfIn PDF document text
    • https://68f06c25-eb64-4e0a-94e3-a0e33e610147.filesusr.com/ugd/463ace_f4f78868965849fa9455942733ce4061.pdf?index=trueIn PDF document text
    • http://sogurorirerew.onlinewebshop.net/the_physics_of_accretion_onto_black_holes.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_off0000e0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EE 5092 bytes
SHA-256: a9e8ff5c16a2c1145879311aeb62c9ae4f803caaee4fcf80c5a90a96f4440710
font_01_sfnt_off0000f242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF242 10308 bytes
SHA-256: 588666fc467fff65bab07ff81f87199d4994928bd25c933147400b4725a4c421

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