Malicious PDF — malware analysis report

Static analysis result for SHA-256 8091fd9753862957…

MALICIOUS

PDF

120.6 KB Created: 2021-03-17 12:39:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: cc67c69913b8ad46679fa9c8d640622d SHA-1: df68b73b50b656fb6f8bef55e9385c990a1d7fd7 SHA-256: 8091fd975386295727c3641fe8620f87931c194ac8a27d7c3ce0d48d75bd9f62
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially garbled, suggests a lure related to a summary, likely to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=el+sue%25C3%25B1o+del+pongo+resumen In PDF document text
    • https://cdn.sqhk.co/wofetewa/mVugigh/eric_church_songs_never_break_heart_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/ijjjhge/download_game_crowd_clash_of_lights.pdfIn PDF document text
    • https://cdn.sqhk.co/mofipife/hhjaKhh/tasomotolitemenowixef.pdfIn PDF document text
    • https://cdn.sqhk.co/pelopuxi/digje5e/adjectives_nouns_and_verbs_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxikanabu/djeHchb/heavy_industries_taxila_board_taxila_cantt_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/karopepagu/iiflijT/zefivix.pdfIn PDF document text
    • https://cdn.sqhk.co/xelajura/xNjjggn/babolat_tennis_racket_size_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/xamizine/htiaWhh/gotifibak.pdfIn PDF document text
    • https://cdn.sqhk.co/vemegunir/cghTgjD/2016_dodge_dart_rallye_horsepower.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuzigup/1WR7u9p/gba_emulator_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/iihjhhe/pictoword_game_answers_level_20.pdfIn PDF document text
    • https://cdn.sqhk.co/kosadara/7FUfUif/9167022544.pdfIn PDF document text
    • https://cdn.sqhk.co/fivodewile/ibfgchi/watete.pdfIn 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
    • https://uploads.strikinglycdn.com/files/2048649f-813e-499f-b16c-26dc77bbf9ac/53980633736.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/zozojibukikotagusix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d60f5fa0-f500-464f-9323-dccddfe735b9/hunchback_of_notre_dame_musical_character_descriptions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60f07774-e67d-4f57-bba8-df950e9ede06/crown_xti_4002_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/94547596918.pdfIn PDF document text
    • https://da5bec28-7969-4117-8ffb-5069fce5e80c.filesusr.com/ugd/31593d_201a2cdba988466eba0b47472375b60e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ninazarila/brand_awareness_articles.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/82607315922.pdfIn PDF document text
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_5fc8e1cadcaf4fbca1e88731536efe9d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/blogger_templates_responsive_2019.pdfIn PDF document text
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_992590d263d94409bed1ebf166e70f0b.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AFC 4992 bytes
SHA-256: 8781e15f4db53555bf4906f70ccd17ee51e824f938d6d3912ba03d1c707805bf
font_01_sfnt_off00019b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B8C 12772 bytes
SHA-256: 3704c6422b8d1c0792b86acf4591b869f5bce72bc8bdf8677888ed644e6aeed1
font_02_sfnt_off0001c4db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C4DB 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71