Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e785f70a513761c…

MALICIOUS

PDF

86.3 KB Created: 2021-04-25 07:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 04fb874bb15deb0e760b733e28538574 SHA-1: 21f7d229d111e8843a8537342c1b43ec1313e831 SHA-256: 1e785f70a513761c971ab18162ba61d976043a6f39a4e8d83995f53718a21560
186 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains, indicating a link farm designed to distribute malicious content or phish for information. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The document body, though heavily obfuscated, contains keywords related to a 'Petsafe stubborn dog collar warranty', serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/strik?utm_term=petsafe+stubborn+dog+collar+warranty PDF link annotation
    • http://vexetifiridik.mypressonline.com/zelavurabekisilata.pdfIn PDF document text
    • http://medebupima.sportsontheweb.net/where_is_the_filter_on_frigidaire_front_load_washer.pdfIn PDF document text
    • https://gepogixuzusesil.weebly.com/uploads/1/3/3/9/133999736/02f77f9.pdfIn PDF document text
    • http://nijagegedok.22web.org/calculus_practice_problems_with_answers.pdfIn PDF document text
    • https://muwujexowosis.weebly.com/uploads/1/3/1/4/131437891/wupudanimik-rojubenapofulij-fitiza.pdfIn PDF document text
    • http://save50it.info/maze_runner_novel_listh6lgx.pdfIn PDF document text
    • http://nesibobivugo.iblogger.org/gewipifuxa.pdfIn PDF document text
    • http://suxoxaxowigab.scienceontheweb.net/world_cup_match_time_table_2020.pdfIn PDF document text
    • https://kobuwejen.weebly.com/uploads/1/3/0/8/130873730/4626253.pdfIn PDF document text
    • http://ketotreno.buzz/blue_dachshund_for_salerf8x3.pdfIn PDF document text
    • https://bipusisep.weebly.com/uploads/1/3/0/7/130775903/2660635.pdfIn PDF document text
    • http://letxxnx.org/free_software_to_modify_documentsdzll7.pdfIn PDF document text
    • https://lanedipeluta.weebly.com/uploads/1/3/4/6/134666686/bedawen.pdfIn PDF document text
    • http://promoocaoameericanas.com/kuxafabetutiwewadofij1h32.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/zalomi/bluestacks_3_for_pc_windows_8._1.pdfIn PDF document text
    • https://8488b7ac-84bc-45ae-88ed-26841205fc59.filesusr.com/ugd/7cda3c_d8236797224a4551a3a9e7ef03a90b9e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/dulavow.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/51830481765.pdfIn PDF document text
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_6f37b9ae9d2843888e979863e4bf4f3e.pdf?index=trueIn PDF document text
    • http://gejizejaniwijef.atwebpages.com/47645261621.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/can_you_solve_the_bridge_riddle_answer.pdfIn PDF document text
    • http://wemitagokodunes.epizy.com/tai_chi_poses.pdfIn PDF document text
    • https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_21a4f107e5df42cd9e99e0581aee3138.pdf?index=trueIn PDF document text
    • http://fonugaxow.epizy.com/zepuvug.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/25015276643.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E6 5524 bytes
SHA-256: a8b63e08c8e95e863f7cb7bf87304c003df1ad32bd0ef2b69197369660b2e54c
font_01_sfnt_off000127d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D6 10476 bytes
SHA-256: c543cad5aac35b9adeeb00f370f082286e529e99a285da63faffc6fc022e03fc