Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1c7b93d82afd25…

MALICIOUS

PDF

90.3 KB Created: 2021-02-23 23:21:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f8ad868f599edcf71a4fc82db975f704 SHA-1: d3787696fb42a18d50189364c1b0156ccc94f593 SHA-256: 1d1c7b93d82afd252fbf0d72e246a1aaaa31af905c3b00aca7e764e114fa2f9a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to a movie title, aiming to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=la+divina+comedia+de+dante+pelicula+completa PDF link annotation
    • http://freedate18.xyz/whisker_city_pet_fountainkec0d.pdfIn PDF document text
    • https://gimiduti.weebly.com/uploads/1/3/4/7/134711596/tazenawobo-jaladagabalabes-vuperibufap.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/loctite_406_data_sheet2yr54.pdfIn PDF document text
    • http://nigma24invest.online/world_political_map_blank_a4_size_printable9c4wq.pdfIn PDF document text
    • http://ostanni.fun/51691632117xgv36.pdfIn PDF document text
    • https://cdn.sqhk.co/nixivezez/FigWhdc/awesome_tanks_5_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/jiv4GLE/download_the_seven_deadly_sins_grand_cross_mod.pdfIn PDF document text
    • http://bestunew.xyz/places_that_sharpen_chainsaw_blades_near_meodsio.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380694/normal_5ffb3e275922e.pdfIn PDF document text
    • https://cdn.sqhk.co/togareguko/gzLDrja/xivemuwogapiwuru.pdfIn PDF document text
    • https://timurikamaz.weebly.com/uploads/1/3/1/4/131406182/rapoxewat.pdfIn PDF document text
    • http://tihefers.online/gta_vice_city_cheater_apkhouse_20140356u.pdfIn PDF document text
    • http://zatoboyvibor.fun/948238628644e22c.pdfIn PDF document text
    • http://my-credit.info/red_cat_eye_designer_sunglassesa2r67.pdfIn PDF document text
    • http://www.opentle.orgIn 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
    • 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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000fcc1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFCC1 15052 bytes
SHA-256: 49a59df44949b3367592886c04a30b5dc28abbeed5021431bdf3bb231caa4fca
font_00_sfnt_off0000ec72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC72 4828 bytes
SHA-256: 20a3fe7353126e801d6fd325d26780a2680ca6d6311b3a411978ea8fc95e9d21
font_02_sfnt_off000126ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126AC 11196 bytes
SHA-256: cda5a71e478a0a4d619a8400d4476580be147a4501abbda018ade5e741142823
font_03_sfnt_off00014b5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B5E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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