Malicious PDF — malware analysis report

Static analysis result for SHA-256 0536abc705ae4cf6…

MALICIOUS

PDF

79.9 KB Created: 2021-04-01 08:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 776ae85cb5526b396e276c701062fe50 SHA-1: bf41ef094fee9d39d288204fa5a2193e73427e8b SHA-256: 0536abc705ae4cf6f86a070c16b0dd5c423c9473747b8cbb0b0eef119e8147e6
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spamming operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via the linked URLs. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://ponafet.ru/wix?keyword=princess+bride+rpg+pdf PDF link annotation
    • https://kemigaguni.weebly.com/uploads/1/3/1/0/131070112/genukivonanoxapipoku.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/hbzhhVn/alone_marshmello_piano_chords.pdfIn PDF document text
    • https://melekutiruj.weebly.com/uploads/1/3/2/7/132740408/kagasep_fesivukor_kesowej.pdfIn PDF document text
    • https://rezibaxuxemabu.weebly.com/uploads/1/3/1/4/131453555/todon-xaleguvasom.pdfIn PDF document text
    • https://tovibebifenoge.weebly.com/uploads/1/3/2/6/132695438/3c4094d.pdfIn PDF document text
    • https://cdn.sqhk.co/wofikubid/AEgnYhg/sears_golf_bags.pdfIn PDF document text
    • https://belexikezetuvom.weebly.com/uploads/1/3/0/7/130775063/3ecf56.pdfIn PDF document text
    • http://sevisotesasare.iblogger.org/types_of_poultry_breeds.pdfIn PDF document text
    • https://cdn.sqhk.co/lefuwaregew/x8Qgcgc/20971931825.pdfIn PDF document text
    • https://cdn.sqhk.co/noxomosanena/3idiigf/mountain_bike_freeride_game.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/9Dgdfye/quran_malayalam_translation_audio_free_download.pdfIn PDF document text
    • https://zinenefubodejig.weebly.com/uploads/1/3/4/3/134338026/zetowi-vizewokakatizad-jegubime.pdfIn PDF document text
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/vetixezizubulus.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://kimawawasero.onlinewebshop.net/book_of_fairy_tales.pdfIn PDF document text
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_e4c8059d57b44bf4a0c83e165682d966.pdf?index=trueIn PDF document text
    • http://baligejot.epizy.com/how_to_convert_kj_mol_to_j_g.pdfIn PDF document text
    • https://63a0a607-6d1b-4b95-a813-f1b07cabc719.filesusr.com/ugd/ad56f2_d43aa3bb8975479598dfcd11f53b9f59.pdf?index=trueIn PDF document text
    • http://gadoxijumulop.epizy.com/24769144364.pdfIn PDF document text
    • http://juzavinozil.epizy.com/what_does_k_represent_when_calculating_cronbachs_alpha.pdfIn PDF document text
    • http://telifujovemevo.atwebpages.com/97677248293.pdfIn PDF document text
    • http://begujewirefe.myartsonline.com/26469631613.pdfIn PDF document text
    • http://weguxuwe.epizy.com/britishness_since_1870.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_off0000eec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC3 4820 bytes
SHA-256: 516113ea421a4f8a70d3ae00bd20ec13a9b47e604a8bcdbad59835074889cb70
font_01_sfnt_off0000ff18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF18 10904 bytes
SHA-256: 177da8b6a28fbf3dd89e6dc248e96efbc9cb0d897d51a3d7c875044b40fdc6ff
font_02_sfnt_off0001242f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1242F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f