Malicious PDF — malware analysis report

Static analysis result for SHA-256 35964a14b0e82ad4…

MALICIOUS

PDF

86.1 KB Created: 2021-04-26 10:25:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 18db77be8852c9ff458bd7156ebf4b35 SHA-1: 2039b6b7b0a3d59303acfe049526a58283af705d SHA-256: 35964a14b0e82ad412c6cc7371ae53f164a0bc657c520ea6f5262144be06ca36
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and 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 0.9995

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/strik?utm_term=lg+l39c+firmware PDF link annotation
    • http://vykupavto54.ru/segewivakakofegojjv.pdfIn PDF document text
    • http://homeolimp.com/549677136170o4pf.pdfIn PDF document text
    • https://cdn.sqhk.co/tawibonikigo/ajgiaSu/hair_clippers_and_scissors_ireland.pdfIn PDF document text
    • https://cdn.sqhk.co/xobabowiwa/c0kicig/tidugexekuwowike.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxabofapuw/ehjjb8w/tiralamumi.pdfIn PDF document text
    • http://revershjtb.site/88410402073nf8mv.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/idggI0n/dirilobaruvevuperezazu.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/bjgDehj/99532496396.pdfIn PDF document text
    • https://cdn.sqhk.co/lasijutag/hUhipgd/ascii_art_copy_paste_among_us.pdfIn PDF document text
    • http://justiciaforjustice.com/what_day_does_rodan_and_fields_paylw37w.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://9b08d158-0e0f-4203-9b31-e1272d977b1c.filesusr.com/ugd/086daf_b702e115a8f040e288dd017a559d2768.pdf?index=trueIn PDF document text
    • https://27aa3d6a-fcc1-4574-a8e0-77dd5bf64dcc.filesusr.com/ugd/7683ec_450046202c3f489a84d4f3e9c47521f5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/principles_of_polymerization_george_odian.pdfIn PDF document text
    • https://13006a6e-9b3f-4191-9e3f-064114488741.filesusr.com/ugd/34464a_ac7266a693844030b63d92e287e91d0c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/tunikeburuwikikexaxarunif.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/how_to_get_attention_from_your_crush_on_social_media.pdfIn PDF document text
    • https://6a8c3f3f-5248-4e80-80e0-4bf2c04f72bc.filesusr.com/ugd/8b2c09_3147d93cd8014d91aff627bc019d62a1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/vegetepasifilisiwevenuko.pdfIn PDF document text
    • https://b00f38ea-0d13-4519-ab0f-1253f0d03ca0.filesusr.com/ugd/289c5e_3c22a8d74fa44d6f8af05c031d820a36.pdf?index=trueIn PDF document text
    • https://c3438639-6a75-4920-aa4f-d1e0b619354f.filesusr.com/ugd/3be3a7_cad4be2a5ea74ab8b72cf6aa67017db2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/cordless_phone_with_2.5_mm_headset_jack.pdfIn PDF document text
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_bce1d8f1672c49adabd88ef24de822bc.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E4 4868 bytes
SHA-256: 03fe8ca0bc33899b8ce7feab35bbd583eb706935e382be14fe72cbb9aefc5d21
font_01_sfnt_off00011674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11674 11224 bytes
SHA-256: 1ca4b1728bb1fdd32edf80eb16fe9d2ae0ffa50dbe65c5a35ece0a99aa06037f
font_02_sfnt_off00013cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CD0 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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