Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5db032043d4080f…

MALICIOUS

PDF

101.4 KB Created: 2021-03-21 09:23:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 4c56308e3e56570252f81ecd36b61077 SHA-1: dfb61b27e18bf7b363fdb0f75ed943329225d290 SHA-256: c5db032043d4080f05d4c41bd62fbd35b0cd952393c5413305867ef8d2f9a124
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to other PDFs, suggesting a link farm or SEO abuse tactic. One critical heuristic identified a mass external PDF link farm. While the document body is heavily obfuscated, the presence of external URIs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is leveraged for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 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.
  • 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://xezojetit.ru/wix?keyword=delta+airlines+uniform+style+guide PDF link annotation
    • https://cdn.sqhk.co/puxitika/Yjcheig/23798088413.pdfIn PDF document text
    • http://sexesex.site/949216785774f7j9.pdfIn PDF document text
    • https://cdn.sqhk.co/sinonari/6Tge3jj/packer_game_live_now.pdfIn PDF document text
    • https://fevujuwevu.weebly.com/uploads/1/3/0/8/130813851/5089669.pdfIn PDF document text
    • https://cdn.sqhk.co/ribobujir/hfifvgi/color._ly_number_draw_color_by_number.pdfIn PDF document text
    • http://24goodstore.site/ingo_devices_hello_kitty_mp3_playerxzrjc.pdfIn PDF document text
    • http://geniusenglish.space/929138183707diqi.pdfIn PDF document text
    • https://lepamume.weebly.com/uploads/1/3/4/8/134882258/voxojejexuwerez.pdfIn PDF document text
    • https://vasinurevesodux.weebly.com/uploads/1/3/4/6/134605286/buguvepedege-lixofudekodido-tepaxugawisuvap-lopupopu.pdfIn PDF document text
    • https://fazofiketir.weebly.com/uploads/1/3/4/5/134507238/6146516.pdfIn PDF document text
    • http://astrohelp.space/2767321752bjskb.pdfIn PDF document text
    • https://cdn.sqhk.co/vewukiziwemi/cV8eDig/beribodegi.pdfIn PDF document text
    • https://xifuvago.weebly.com/uploads/1/3/0/8/130813557/3637044.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/xufoxorog/word_templates_weekly_meal_planner.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/55573848990.pdfIn PDF document text
    • http://ziwibavufu.rf.gd/relowawudolasopefupalami.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/dungeon_masters_guide_5e_download.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/wolfgang_puck_bistro_7_cup_rice_cooker_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/18787371547.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/narrative_essay_outline_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/9611283258.pdfIn PDF document text
    • http://tasefabomodewiv.epizy.com/css_formatter_online_tool.pdfIn PDF document text
    • http://danijikuguwidak.rf.gd/the_vampire_diaries_merch_shop.pdfIn PDF document text
    • http://jazosorolanik.rf.gd/68752120155.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/xidosajekakifewojik.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/call_center_time_study_template.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_off00014c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C70 5328 bytes
SHA-256: f783cd9d7eaa02918261583e9364a5b604812209bb71360c2cd85b4bd23fa423
font_01_sfnt_off00015e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E88 12096 bytes
SHA-256: aa7190a5722d11ef7423dafbf2ae44dd2dfae861649266623a732b46968ee18a

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