Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffcab8d7d5a1182c…

MALICIOUS

PDF

74.3 KB Created: 2021-03-01 05:47:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1f52d05b8a60f5e9c216bd9a0c70d8bc SHA-1: 9e2a693005fbc17bdaa5ec9d663f371307b4e338 SHA-256: ffcab8d7d5a1182c550971c68b730b3f1277de54be4cac11e2afc66055f7ce7a
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 0.9997

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://jottigo.ru/wix?keyword=nmun+position+paper+guide PDF link annotation
    • https://cdn.sqhk.co/zivalutapa/gjigHhf/digital_marketing_graduate_programs_online.pdfIn PDF document text
    • https://cdn.sqhk.co/sadetujadufi/Q7dYihf/hidden_objects_treasure_hunt.pdfIn PDF document text
    • https://cdn.sqhk.co/libibajuzumu/Trlj9hj/sheltered_instruction_observation_protocol_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/pugudanirav/Cp2uhcP/83703254756.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/jahejia/2318203984.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/hfD0vmT/university_of_montana_missoula_address.pdfIn PDF document text
    • https://cdn.sqhk.co/videgogaf/dichhjj/xufaxagumuxenewegolosaku.pdfIn PDF document text
    • https://cdn.sqhk.co/winelolibug/ZXiiSiT/joycon_droid_public_alpha_download.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/tefuwenuj.pdfIn PDF document text
    • https://cdn.sqhk.co/judawube/hajPmif/41011143654.pdfIn PDF document text
    • https://cdn.sqhk.co/zufuxirap/idROibo/zivajabafet.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/basketball_plays_for_middle_school_against_zone.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzokikili/nkiaieA/85888353491.pdfIn PDF document text
    • http://lajulufubugo.22web.org/minimum_speed_for_streaming.pdfIn PDF document text
    • https://cdn.sqhk.co/damukowabij/9hgIggg/ben_10_wallpaper_4k_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://miwofalixi.rf.gd/capture_one_pro_sony_11.pdfIn PDF document text
    • http://winemuvigurema.rf.gd/borbaad_movie_song_ringtone.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/99819179531.pdfIn PDF document text
    • http://zaxesagujudiwa.epizy.com/jutafakisagininixagokiwu.pdfIn PDF document text
    • http://zokekoja.rf.gd/when_to_use_single_and_double_quotation_marks_australia.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_off0000e878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE878 5216 bytes
SHA-256: a96fd8831664b0ab67ae35a322d3a820401f289df7d6865746221f2450e8791b
font_01_sfnt_off0000fa1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1D 9960 bytes
SHA-256: df701c851710f8d391e470c0268a5cd4d62691f958fc0cad41046d351c40b7f7

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