Malicious PDF — malware analysis report

Static analysis result for SHA-256 64ccd8f990ad53ef…

MALICIOUS

PDF

94.4 KB Created: 2021-03-16 21:20:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a9d028da140727c3c48bbaffd593553a SHA-1: 112afabbbb8018733a0732f9d6884e05396a9c97 SHA-256: 64ccd8f990ad53ef0a50e24c70a18b24a1d287d1237cf9ab7c5afb25ae3800af
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to a baby carrier, likely a lure to direct users to the malicious URL. No scripts were extracted, but the presence of external URIs and the overall detection suggest the document is designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/strik?utm_term=how+to+put+on+ergo+360+baby+carrier PDF link annotation
    • https://cdn.sqhk.co/satofapo/i3idwLi/pac_12_now_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385848/normal_5ff2d69b3fe93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368495/normal_601e202756428.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483082/normal_6042e2dbbb196.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474169/normal_6039f049b4472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401540/normal_602d7f659f0d1.pdfIn PDF document text
    • https://cdn.sqhk.co/lulaxujik/Xid4jhS/12510105550.pdfIn PDF document text
    • https://cdn.sqhk.co/zamokaxu/Pgdlgim/30085563615.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/perurulexi/twinkle_twinkle_little_star_variations_piano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d952d7ac-a16a-4b3d-a79c-feb1fa818ffc/how_to_make_your_dress_glow_in_royale_high_2020.pdfIn PDF document text
    • https://f499a9ea-5579-4d3c-a180-ba191067f9b7.filesusr.com/ugd/34ec99_2c838745a0554764b5abc8e669c1459a.pdf?index=trueIn PDF document text
    • https://8641c524-1fb5-4292-87ed-dd72f64d6c22.filesusr.com/ugd/9b7d8a_fe85a49fba854d59b1b42619497e5778.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/47b1b8a5-7e09-4530-8d9d-63adc047b13e/gupusomixobigesopokowok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaa8da9d-83fe-4791-a34d-4c0856deb22a/will_there_be_any_more_throne_of_glass_books.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/26816355224.pdfIn PDF document text
    • https://6a8c3f3f-5248-4e80-80e0-4bf2c04f72bc.filesusr.com/ugd/8b2c09_7173f0e0fb6b44f58e8343cc8e807310.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/binary_logic_gates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c1f6bcd-6acd-4be7-8fae-752ed6868dd6/yaar_nuri_ztrk_meal.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/65845167654.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4be038f6-bc85-4841-9463-8a2959adcd2a/murray_riding_mower_battery_voltage.pdfIn PDF document text
    • https://488c2ff9-9ff4-499e-8f11-525115e20b22.filesusr.com/ugd/8aba0c_21f23c65f48a42348810352e24f02131.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tiduro/60045419906.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_off00013276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13276 5644 bytes
SHA-256: c2d4d2b1851b263d0a7a983d877cd2970d12bfb53236bf2e8caa6d9c0e0eb5e3
font_01_sfnt_off000145da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145DA 11708 bytes
SHA-256: 6a6267215b0af7073d8efc0c8b03acf95b4c67bc8c9983c4b1de29e3f6061610