Malicious PDF — malware analysis report

Static analysis result for SHA-256 9359dd14f36812bc…

MALICIOUS

PDF

77.1 KB Created: 2021-03-10 23:47:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 49546958cf6c320a850aca6f45977266 SHA-1: dc302c116eb610eb1bedfdf135a52574365035e2 SHA-256: 9359dd14f36812bc3e17f95b82ee498f857b45fc5917755386c559ccd22348d4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links on potentially untrusted hosting, likely to direct users to malicious sites. No scripts were extracted, but the presence of external URIs suggests an attempt to redirect the user to a compromised or malicious web page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/wix?keyword=unlock+sprint+note+5+for+at%2526t PDF link annotation
    • https://cdn.sqhk.co/juwovatagevi/ejicyJV/cowboy_good_morning.pdfIn PDF document text
    • https://cdn.sqhk.co/nanuvoxeva/hi4hiRa/debiri.pdfIn PDF document text
    • http://suwadebizon.mywebcommunity.org/oxford_chinese_dictionary_free_download.pdfIn PDF document text
    • http://tezibif.mygamesonline.org/71828711462.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/links_awakening_face_shrine_gameboy.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/gaAQifp/15157845304.pdfIn PDF document text
    • http://wurigebajufopo.22web.org/pioneer_vsx_521_k.pdfIn PDF document text
    • https://cdn.sqhk.co/zidezofa/cjcha9z/famodupebunotinokiv.pdfIn PDF document text
    • https://cdn.sqhk.co/kanereneb/kXAZfji/46188818118.pdfIn PDF document text
    • http://kimokabif.medianewsonline.com/sakewatemigixoluwiri.pdfIn PDF document text
    • http://narosisebono.22web.org/padopizusupinasunuf.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
    • http://zofududa.rf.gd/hope_this_finds_you_well_answer.pdfIn PDF document text
    • http://degivenumi.epizy.com/kitchenaid_gas_stove_griddle.pdfIn PDF document text
    • http://femejuzi.epizy.com/canto_de_pajaros_en_el_campo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1c02526-f4b1-4d16-9dfc-e854b0665824/ar_15_scope_with_night_vision.pdfIn PDF document text
    • http://joxumokuri.epizy.com/betsi_cadwaladr_uniform_colours.pdfIn PDF document text
    • http://magonusu.epizy.com/paraphrasing_exercises_esl.pdfIn PDF document text
    • http://pebirexewilujup.epizy.com/how_to_install_ds4vita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2edd4f06-2708-4052-ae55-a2e91215434d/what_is_the_meaning_behind_house_of_the_rising_sun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b537b1a0-90f3-4aa5-a6c5-42a17c6154b6/masterbuilt_butterball_oil-free_turkey_fryer_manual.pdfIn PDF document text
    • http://sodowurivav.onlinewebshop.net/11490627778.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE614 4976 bytes
SHA-256: 8bb67a74a07efb61e745921cf2aee28b4719d60f8d89d56f141a4b9c43ae27c1
font_01_sfnt_off0000f708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF708 9980 bytes
SHA-256: 0ff770680f6bd0b70dc18c71d98c22ff8efd333c7382ba064e336203eb2711a4
font_02_sfnt_off0001193b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1193B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f