Malicious PDF — malware analysis report

Static analysis result for SHA-256 169a891feb37d87a…

MALICIOUS

PDF

75.5 KB Created: 2021-04-29 09:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: abe4aab7e90c6345531d9f1d0631dc08 SHA-1: 243db004c5cafa2b0dd46726e18398435e35dd26 SHA-256: 169a891feb37d87a9989c90918c5aa585b7330a9103cb9027fe047f723111bc9
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 pointing to disposable hosting services, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=breville+the+smart+oven+1800-watt+convection+toaster+oven+-+bov800xl PDF link annotation
    • https://tufojeju.weebly.com/uploads/1/3/0/7/130740258/4291601.pdfIn PDF document text
    • https://cdn.sqhk.co/zukasedu/6ia6Bgq/96008654420.pdfIn PDF document text
    • http://myyshooop224.site/85074017446xv8yj.pdfIn PDF document text
    • https://cdn.sqhk.co/nezafomura/jhjeqzf/jewad.pdfIn PDF document text
    • https://jebovemedafo.weebly.com/uploads/1/3/0/8/130813903/toxuzaginufujas.pdfIn PDF document text
    • https://vizumijolotetip.weebly.com/uploads/1/3/5/3/135394273/4621519.pdfIn PDF document text
    • https://woxisuxifajise.weebly.com/uploads/1/3/5/4/135400236/2261195.pdfIn PDF document text
    • http://copyrightsupporthelpcenter.com/61707833944mqg7j.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/4Yhbhjr/wuzufilavagixovagimogogux.pdfIn PDF document text
    • http://padapup.iblogger.org/asme_sec_viii_div_1_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://40c507a3-37b7-491f-afd3-f28ba3af1fb2.filesusr.com/ugd/7f5264_f32f9b33dfd04a099538de13d9ae23ad.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/516c69b1-bf39-4bfd-b098-b017dc189c9f/wd_tv_live_hd_media_player_remote_control.pdfIn PDF document text
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_1381344901b84be3a29174c53b208db5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5b7fb0c-3f92-434e-81f7-49fd2dccc23e/bagupowape.pdfIn PDF document text
    • http://tonesovuxor.rf.gd/alpine_mrv-m500_specs.pdfIn PDF document text
    • http://xulewuxusun.epizy.com/xuxosokebamevogeruwagewa.pdfIn PDF document text
    • https://153f2bed-3501-4ec5-9468-ed1987511f6d.filesusr.com/ugd/f67134_3a6c722ccb374d91b5fbb159f1cf1dd3.pdf?index=trueIn PDF document text
    • https://2eeb51df-07ba-4372-80d9-1ef4646fc7f7.filesusr.com/ugd/6af210_249473b01fdc4affa3ce3f5c6007102b.pdf?index=trueIn PDF document text
    • http://wejofofufaxut.epizy.com/48751784500.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_off0000e7d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D3 5868 bytes
SHA-256: 266334345600c45d4db3a26737fe957e1a6bfced232024854379d181d933602a
font_01_sfnt_off0000fbbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBE 10720 bytes
SHA-256: f09ea5037a58e366cb1982752b18ec25624b3ca760647dd2b3a71c0861801458

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