Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f448df2e058d600…

MALICIOUS

PDF

78.2 KB Created: 2021-03-30 03:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e7af7360a3c24ebeb8b495387dac6cb5 SHA-1: 7179a4bbfc2ef387fc38e0ec0175bbdc6f7d7af6 SHA-256: 6f448df2e058d600f770f94d51ec482bc11ee1e6cce8c5d920088efc766f4e90
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

Heuristics 5

  • 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://mezovuduw.ru/award?keyword=how+to+cite+pdf+file+in+mla+format PDF link annotation
    • https://gexuguxibam.weebly.com/uploads/1/3/2/6/132696321/59ee43a.pdfIn PDF document text
    • http://vegifeda.mypressonline.com/lg_air_conditioner_fault_codes_c5.pdfIn PDF document text
    • http://zijozarub.mygamesonline.org/the_man_in_the_high_castle.pdfIn PDF document text
    • https://zomawetojenil.weebly.com/uploads/1/3/4/3/134331930/a4d32d5072f99a.pdfIn PDF document text
    • https://cdn.sqhk.co/vomofizog/eAibihy/arteriovenous_malformation_radiology_brain.pdfIn PDF document text
    • https://cdn.sqhk.co/jojevirelo/HjjamuJ/kulolarure.pdfIn PDF document text
    • https://mituzeru.weebly.com/uploads/1/3/2/6/132681412/4443664.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/64151093430.pdfIn PDF document text
    • https://zoxalutaj.weebly.com/uploads/1/3/1/4/131407742/mabipakij.pdfIn PDF document text
    • http://fofumumitem.medianewsonline.com/99_names_of_allah_and_its_benefits_of_reciting.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/hh1jigh/painting_with_a_twist_san_antonio_riverwalk.pdfIn PDF document text
    • https://cdn.sqhk.co/gidetixi/xGjhiig/extreme_car_driving_simulator_2_game_download_uptodown.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuxuxasezid.atwebpages.com/55616974575.pdfIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_79a02a324bc246d68981dfc138320fad.pdf?index=trueIn PDF document text
    • https://676a7a22-5bec-432e-92e0-9d4a0a27851c.filesusr.com/ugd/a1fb72_b35be5222d2140aab5daae044f635a47.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7a606ba-fede-4324-af27-1105b9b2ffea/5647023651.pdfIn PDF document text
    • http://pivimufe.atwebpages.com/63775076764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abf1ef0c-9de5-46e7-a815-6e3146019615/the_lottery_movie_2018.pdfIn PDF document text
    • https://7980b0ff-2efe-48f4-a442-6c87bca80713.filesusr.com/ugd/9bd8c3_0e4ae3ff6c504c09b62f014dd0b3d580.pdf?index=trueIn 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_off0000f36d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36D 5176 bytes
SHA-256: 574fc09df28a1dedb9418c3b2879c73ccfd31366a66bf3e6b0011dd505d5dfba
font_01_sfnt_off00010501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10501 11100 bytes
SHA-256: ddee948c73c51761c52cb1ff87f34f920962df02bbce720575cd817dc9a6b553

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