Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f8bece708d2c95…

MALICIOUS

PDF

78.2 KB Created: 2021-03-04 04:32:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 23d4411c3b0002fbc3b05cab8159bb03 SHA-1: dfba9f53f4caf58772327c6fa0495b3b8e7a0737 SHA-256: d0f8bece708d2c953ee3fd9f8d4b3da7d69dc9153c184707d06545ac8e174261
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm, pointing to various domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or SEO spam. The embedded URLs suggest an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://midufefew.ru/wix?keyword=ul+60950-1+expiration PDF link annotation
    • http://mitutepoka.medianewsonline.com/bajebatizalonebok.pdfIn PDF document text
    • https://cdn.sqhk.co/zexukobesu/Ywhi73e/zawewibijodisotuxisokot.pdfIn PDF document text
    • https://cdn.sqhk.co/piredonina/dbhg0ml/map_among_us_skins_pc.pdfIn PDF document text
    • https://tibijipobarak.weebly.com/uploads/1/3/4/4/134493900/reredalifitig-nixizijitusobeg-nutovukitixilo-daliporigurezi.pdfIn PDF document text
    • http://basumoxivor.sportsontheweb.net/spice_and_wolf_anime_episodes.pdfIn PDF document text
    • https://cdn.sqhk.co/bidekidarub/hciAzje/chinese_checkers_marbles_set.pdfIn PDF document text
    • https://cdn.sqhk.co/vawadawuleja/g66gf6k/krabat_and_the_sorcerer_s_mill.pdfIn PDF document text
    • http://national-verifyteam.com/4497077317215no.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/90722356465fcu6g.pdfIn PDF document text
    • https://cdn.sqhk.co/jutigurotow/48ghahg/the_trip_to_italy_restaurants_map.pdfIn PDF document text
    • https://xekigumi.weebly.com/uploads/1/3/0/7/130776031/6330858.pdfIn PDF document text
    • https://boxizegovabore.weebly.com/uploads/1/3/1/3/131379280/gagos_savezavakovuru_punivilum.pdfIn PDF document text
    • http://milanomoda-italy.site/paroledefap9n5lw.pdfIn PDF document text
    • http://idealica-uficiale.website/lovely_nirman_all_songsduqz7.pdfIn PDF document text
    • http://kellys.space/majesty_yp_250_manualyamdb.pdfIn PDF document text
    • https://sozizupisez.weebly.com/uploads/1/3/1/8/131872239/nanifasagugutofo.pdfIn PDF document text
    • http://gratoramaa.website/162485794314dzhq.pdfIn PDF document text
    • http://tb-films.ru/seed_of_chucky_hd_movievun3i.pdfIn PDF document text
    • http://randname.ru/how_would_you_describe_the_climate_of_the_philippines3dxdo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wudazebej.atwebpages.com/remix.pdfIn PDF document text
    • http://xurosuforudev.atwebpages.com/what_type_of_wood_chips_to_use_in_masterbuilt_electric_smoker.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_off0000f504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF504 5352 bytes
SHA-256: a00836868fdb2d7b109c4982d328304de38a0348ba5635c3d404f35c71a64681
font_01_sfnt_off0001075e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075E 10848 bytes
SHA-256: 99cee4f718f29bc92cc3862d55c9111a5171c8bdf979b9e91586d3d614098e16

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