Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c035dc21d1a4c5b…

MALICIOUS

PDF

56.9 KB Created: 2020-10-28 17:30:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 00d2b98b848ef2986c7824e72f908e7a SHA-1: dd1fea62a934f8fd81e7fef531d5f8a51c198a0f SHA-256: 5c035dc21d1a4c5ba563fd74cbb028b2e310551626da6d688dbbd4782faebd66
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to link farms and redirectors, indicating a malicious link distribution scheme. The heuristic 'SE_MFA_LURE' suggests the document is designed to trick users into providing sensitive information, possibly related to multi-factor authentication. The presence of a malicious redirector link further supports the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://gettraff.ru/pify?keyword=uniden+d1780+phone+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379377/normal_5f938be063c56.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lulodegoner.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_5f8f8a82b026b.pdfIn PDF document text
    • https://zodovamerevi.weebly.com/uploads/1/3/4/3/134316438/67640badb8d02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5f897319e4be2.pdfIn PDF document text
    • https://ruxibero.weebly.com/uploads/1/3/4/4/134403554/zolig-gasepi-putidikag-vimid.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/3772399.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/novovuxosijuzuz_wofabunutigepuw_dugulelura.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368223/normal_5f8af441025b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f8c000f7e029.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380692/normal_5f8d8784eb1d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369762/normal_5f895a6cf0bc7.pdfIn PDF document text
    • https://rovemijiv.weebly.com/uploads/1/3/4/3/134343091/6b499d765989.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/tetazino/drdo_ceptam_09_technical_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/calendario_novembre_2018_da_stampare.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/risemes.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/pdf_atkins_meal_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/tuwopibojiba.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/beethoven_fur_elise_piano_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/chalazion_traitement.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/pdf_file_to_jpg_converter_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/hiperplasia_benigna_de_prostata_2018.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000084b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B3 5384 bytes
SHA-256: ce88cb69c9b832850b8b03b9ebde09e51f8be7bde7b8d54b992e43aed811340b
font_01_sfnt_off000096ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96EE 12040 bytes
SHA-256: 2594bda469f2807f5ea25870508054a0634dbdf0bed3f534e4718523e784ea22
font_02_sfnt_off0000bf3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF3A 16656 bytes
SHA-256: fdb4d8c746019dc57daf76b89769e017bf1a1058cae8c408a3f0c7b34153430c