Malicious PDF — malware analysis report

Static analysis result for SHA-256 61d208b5dd944d27…

MALICIOUS

PDF

77.8 KB Created: 2021-02-22 06:24:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 38ff549c9875074302cd3ae669ae97b9 SHA-1: 68485d2a86f6e0b76efec3a185d0ea0fbf8349fa SHA-256: 61d208b5dd944d2702b7a3cf4c8a5ad3f2787f8f13c7911437eedc20337ca680
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://jacksth.ru/123?utm_term=is+agile+always+better+than+waterfall PDF link annotation
    • https://wolunogejafijut.weebly.com/uploads/1/3/4/6/134649672/320230.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimanujage/giaJjbw/free_christian_music_internet_radio_stations.pdfIn PDF document text
    • http://chempion.coffee/tokyo_jr_map4ljmo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426830/normal_5fd880af7089a.pdfIn PDF document text
    • https://pufinixebajev.weebly.com/uploads/1/3/0/8/130873949/woxudegodikelekiwu.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/ijjiO47/polaroid_originals_cameras_and_stranger_things_collection.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464735/normal_602ad5aae5559.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447253/normal_60312f8a1eb2b.pdfIn PDF document text
    • https://cdn.sqhk.co/dutudovajud/Jojfi90/tadijunexafupimifo.pdfIn PDF document text
    • http://bestunew.xyz/child_care_leave_format_in_west_bengallor9n.pdfIn PDF document text
    • http://zatoboyvibor.fun/lettering_guide_tooll92vz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470698/normal_6020a4cc94c18.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/rekorewexidiwo/entrepreneurial_intention.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/new_york_charities_bureau_form_char500.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/pflanzenbestimmung_nach_blattformen.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_off0000f408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF408 5300 bytes
SHA-256: 360eb065db2405dfc9650767d7c02cbfcba2149b45fa61d68b0b14e64cff98df
font_01_sfnt_off00010620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10620 10612 bytes
SHA-256: a6a0fbc704db732936ae58703163c873a6bf9aa9595b72938b622bde85d56760