Malicious PDF — malware analysis report

Static analysis result for SHA-256 203c0f426376d3da…

MALICIOUS

PDF

82.6 KB Created: 2021-06-12 20:00:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 22710927d982ba50c0e3c96a5efd2c30 SHA-1: aa6a668ecb9d692b0d780e6f0ea3be1ac653f4d3 SHA-256: 203c0f426376d3da01ea86c8db852f8e7bbd3663f0e76318821eef52316d439a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of external links, many hosted on disposable domains, characteristic of a link farm. The primary URL suggests a lure related to game ROM downloads, potentially to trick users into visiting malicious sites. The ML classifier strongly indicates malicious intent, and the structure points towards exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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://pixomot.ru/pbw?utm_term=pokemon+fire+red+version+rom+download PDF link annotation
    • https://lusebedadejaxid.weebly.com/uploads/1/3/1/4/131407110/nisiputotajuko.pdfIn PDF document text
    • https://sagejajake.weebly.com/uploads/1/3/5/3/135303377/a236d0037e5e982.pdfIn PDF document text
    • https://gatojodegapov.weebly.com/uploads/1/3/1/6/131637656/wokadosegopek-xunav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408330/normal_601330d59ca38.pdfIn PDF document text
    • https://dewotime.weebly.com/uploads/1/3/1/6/131606762/texude_tuwukujukejuba_lifalot_tiwazafexifa.pdfIn PDF document text
    • https://zexexoxanevekig.weebly.com/uploads/1/3/4/6/134672397/rirokovapakuwavo.pdfIn PDF document text
    • https://defutijobazaso.weebly.com/uploads/1/3/4/5/134587482/xufitu.pdfIn PDF document text
    • https://faloxumotib.weebly.com/uploads/1/3/4/6/134646793/1154d41ff.pdfIn PDF document text
    • https://zanewodibamejat.weebly.com/uploads/1/3/0/9/130969445/rotodawojipor_boborikixemolul.pdfIn PDF document text
    • https://goxesepejapumew.weebly.com/uploads/1/3/4/6/134609979/xorig.pdfIn PDF document text
    • https://lobalose.weebly.com/uploads/1/3/6/0/136089755/61930d70c.pdfIn PDF document text
    • https://natadafupekex.weebly.com/uploads/1/3/1/8/131856288/bibufebu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416301/normal_600b238e6e751.pdfIn PDF document text
    • https://pevigegokepos.weebly.com/uploads/1/3/4/3/134366184/lowubiguwaxu-fomipo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496391/normal_60376a09ad79d.pdfIn PDF document text
    • https://gugagefa.weebly.com/uploads/1/3/4/3/134343265/ritul_lezezisoguvop_forifasimuliji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470535/normal_60bbc38da61e0.pdfIn PDF document text
    • https://julupovopanar.weebly.com/uploads/1/3/4/7/134732987/zokejenotugawed_fufevujedavev_vevazogofu_vamopikajedev.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/13b512b2-d8ae-41fb-b3c2-26520d277a44/masterbuilt_oil_free_turkey_fryer_directions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4fea40f-f3cf-457f-99a8-96f376c3d749/jawbone_mini_jambox_wireless_bluetooth_speaker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8c0ea56-b0a8-46b2-9dec-39e254b03faa/bill_of_sale_for_a_mobile_home_in_florida.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d78e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78E 4976 bytes
SHA-256: 78b1b26c598537ab906ef988037eb80b85b3252f2f3751445462742707b45ae4
font_01_sfnt_off0000e861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE861 3648 bytes
SHA-256: 5deedea67faf4700ab2275527717dd9594bb2031fbccdd059991b7c4a78f5ca8
font_02_sfnt_off0000f5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AC 10500 bytes
SHA-256: 77030d1944199d43af76ec3ee5d0e4ef4439a19e416a51765ca8d9332abd4b84
font_03_sfnt_off000119be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BE 16036 bytes
SHA-256: 149cab45689013e99d1aa520d2e5234663aa5d8577b6aae5e423b5d60aeda4c1
font_04_sfnt_off00012e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E26 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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