Malicious PDF — malware analysis report

Static analysis result for SHA-256 744a219eaf4ec5e9…

MALICIOUS

PDF

90.3 KB Created: 2021-04-01 04:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 89401d5da8be0db13383bbfa651e1d0e SHA-1: 8526adaadf431c27882465353d319a5adee2e8d3 SHA-256: 744a219eaf4ec5e9cd501afc60dd5d15b124097569e4e531c1afd79a27b6dc2a
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many pointing to disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains keywords related to game downloads, reinforcing the lure tactic. The presence of external links suggests the PDF is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://resalured.ru/wix?keyword=despicable+me+minion+rush+download+apk PDF link annotation
    • https://depopuxa.weebly.com/uploads/1/3/4/8/134893869/kupufitevilit.pdfIn PDF document text
    • http://sutezesibopixiv.medianewsonline.com/81688149897.pdfIn PDF document text
    • https://tiruzezisuwef.weebly.com/uploads/1/3/4/4/134499189/2876127.pdfIn PDF document text
    • https://lapawiniposa.weebly.com/uploads/1/3/5/3/135323982/5617350.pdfIn PDF document text
    • http://zabekoreju.iblogger.org/a_genese_allan_kardec.pdfIn PDF document text
    • https://xojajulu.weebly.com/uploads/1/3/1/3/131382271/pakipozitawas-vurizabuzes-pulixiw.pdfIn PDF document text
    • http://banepudota.iblogger.org/the_adventures_of_huck_finn_disney_movie.pdfIn PDF document text
    • https://jeluxipofike.weebly.com/uploads/1/3/4/4/134490416/4477534.pdfIn PDF document text
    • http://wekanisa.scienceontheweb.net/biostar_handbook.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/532af306-b59c-4849-b6c3-3911189fddaf/ba3po42_lewis_structure.pdfIn PDF document text
    • https://cceb078e-1df6-42b0-9e12-359f30e42f1d.filesusr.com/ugd/e8506d_b22b61740d8d48f397d1408eee3643a7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/50ae7984-5405-4a65-b596-ad8f62e8be6e/mushoku_tensei_eris_mother.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22f56e08-eda9-4f00-8c48-a82a4d6631dc/parrot_mki9200_update.pdfIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_57a6e03835794a92b0008bebe4970e38.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/xidekelelujadizuvalixafaz.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/32938254279.pdfIn PDF document text
    • http://bopinifugeraroz.rf.gd/diarios_de_motocicleta_summary.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/37119990908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/953bea9f-1e4c-46a4-bde9-d9621b66f86f/78851552871.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/delonghi_dragon_two_heater_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/abraham_lincoln_movie_video_song.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB31 5608 bytes
SHA-256: 4ca2b6f74f5c95f4e337eb5519fccee13a1cb970d64d90b93dc02569a9290162
font_01_sfnt_off0000fe1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1D 9372 bytes
SHA-256: f771c2e22628515c514dfca77ee4ff9fb467aa9732f84c93c61e748fcdc191ec
font_02_sfnt_off00011c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9F 10816 bytes
SHA-256: 0291df9df5dff57d8f531b92767244cb68fae9e32da7a3059103cad5a3da6dba
font_03_sfnt_off000141e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141E6 17140 bytes
SHA-256: bedcc3ffce12211e7d908ab92ab308a1ebbb667493ac5992a5d690a85516917f