Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac06df772e34d8f4…

MALICIOUS

PDF

88.0 KB Created: 2021-03-31 21:38:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e1421bec1d4e7d7a0da419bbc303b34e SHA-1: cff7367ec4f6ec8ea5000c51508741166a9d77fe SHA-256: ac06df772e34d8f4a20c646d448431bca22df03a7c55ab7ea741555c5d972f17
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable domains and redirector infrastructure, indicating a link farm designed to lead users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to exploit users via redirection.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=cuentos+de+ciencia+ficcion+largos In PDF document text
    • https://cdn.sqhk.co/konajera/nwidjeI/sopedagi.pdfIn PDF document text
    • https://jogojirodatu.weebly.com/uploads/1/3/4/3/134321770/terafavexetiwusixosa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_6022502086095.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408170/normal_604f483b7cbe2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_601dcffadae26.pdfIn PDF document text
    • https://kelulove.weebly.com/uploads/1/3/0/7/130775366/8716805.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/jxAhjp2/collect_15_red_war_exotics.pdfIn PDF document text
    • https://jawuvufos.weebly.com/uploads/1/3/4/8/134856807/weserijomag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427544/normal_5ff6749020a8e.pdfIn PDF document text
    • https://vizegibog.weebly.com/uploads/1/3/4/4/134458583/5823625.pdfIn PDF document text
    • https://jukonejidar.weebly.com/uploads/1/3/4/8/134876273/10edb7c3cf596dd.pdfIn PDF document text
    • https://cdn.sqhk.co/vatomepipiw/jixhihi/1446335312.pdfIn PDF document text
    • https://lebipogife.weebly.com/uploads/1/3/5/9/135990957/96e413d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409819/normal_602dd4740b842.pdfIn PDF document text
    • https://jeduwisuduxib.weebly.com/uploads/1/3/1/4/131483356/6385370.pdfIn PDF document text
    • https://netebina.weebly.com/uploads/1/3/4/5/134596662/32e03.pdfIn PDF document text
    • https://vaferomesab.weebly.com/uploads/1/3/4/3/134351928/eb5df24113679.pdfIn PDF document text
    • https://cdn.sqhk.co/faxidopudome/ihhjich/fejaxegiwikonepedesabuxeg.pdfIn PDF document text
    • https://sanokigoj.weebly.com/uploads/1/3/4/8/134863934/bbbe8.pdfIn PDF document text
    • https://xizirujikalowev.weebly.com/uploads/1/3/1/4/131454807/87da00d.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/wulotugadag/alaipayuthey_kanna_tamil_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/sonic_all_stars_racing_transformed_android_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/sesovodumotewupised.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/complete_1001_arabian_nights_book.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/78483779301.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_off00011bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD3 5092 bytes
SHA-256: 31f7c3e73e4dd9fb210624173a687cdb4bd07489df037520b2995cc102e868b3
font_01_sfnt_off00012d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D2D 11532 bytes
SHA-256: 152da56a37c902edb8d5120146ca0e836ddd23469bb42c984b8ccdf2e9c912e7

Open this report in the interactive analyzer, or submit your own file for analysis.