Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6409673c614244c…

MALICIOUS

PDF

80.8 KB Created: 2021-02-22 22:41:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: c43b644393377505b2aa43f10b7fc11b SHA-1: 99d5b63673fc28a1a079117a0d6308173693e3a2 SHA-256: f6409673c614244c59b139aacad58a0d4ac2bbbdffbbd821f90237d5e797bbc6
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a link farm. It contains numerous external URIs, many hosted on disposable domains, suggesting an attempt to manipulate search engine results or redirect users to potentially harmful content. While no scripts were directly extracted, the PDF structure and extensive external linking are indicative of a phishing or content distribution scheme.

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://leonvi.ru/wix?keyword=the+kiss+of+deception+3+pdf PDF link annotation
    • https://cdn.sqhk.co/losokifape/hhghbgg/belilokinixu.pdfIn PDF document text
    • https://cdn.sqhk.co/xonudutixova/ewzQijb/9283587725.pdfIn PDF document text
    • https://povemiloten.weebly.com/uploads/1/3/4/6/134608376/d3a659e079e59.pdfIn PDF document text
    • https://nuniladolu.weebly.com/uploads/1/3/0/7/130775245/57278.pdfIn PDF document text
    • https://cdn.sqhk.co/vikoparif/3wigp5j/18143661484.pdfIn PDF document text
    • http://sunshop.pro/82662227180v5jm.pdfIn PDF document text
    • http://lnstagramverifiedbadgeservice.com/residolosutafoxuginubulu3unc5.pdfIn PDF document text
    • https://pojikajuruwasi.weebly.com/uploads/1/3/2/6/132695468/cebb5a91cb.pdfIn PDF document text
    • https://nuzozixajalupik.weebly.com/uploads/1/3/0/7/130739607/9512499.pdfIn PDF document text
    • http://lnstagramcentre.net/70176980321pmb78.pdfIn PDF document text
    • https://firikanafumofud.weebly.com/uploads/1/3/0/9/130969048/ferijovupulibuz.pdfIn PDF document text
    • https://cdn.sqhk.co/vutowogipu/ghejcf1/6647212878.pdfIn PDF document text
    • http://reduslim-shop.website/rapiwu86hwl.pdfIn PDF document text
    • http://musofiron.ru/86666457471xs34x.pdfIn PDF document text
    • https://zokilare.weebly.com/uploads/1/3/4/7/134767859/vazijevabi_rigojozu.pdfIn PDF document text
    • http://vigastlens.xyz/91229967331vxzv8.pdfIn PDF document text
    • http://ubsvp.com/bloons_td_5_ios_freeyjonj.pdfIn PDF document text
    • https://kerozutovazo.weebly.com/uploads/1/3/0/8/130813796/6041b43d6e6e8a4.pdfIn PDF document text
    • http://yoganchik.space/free_fake_towing_receiptpv6fl.pdfIn PDF document text
    • https://zabagogaj.weebly.com/uploads/1/3/5/3/135313674/tagul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wojodiguf.rf.gd/nixeradipupujo.pdfIn PDF document text
    • http://tawuzosidekelos.epizy.com/74023995628.pdfIn PDF document text
    • http://jitemawuvefogox.epizy.com/agathiyar_movie_video_songs.pdfIn PDF document text
    • http://xesidif.epizy.com/definition_of_normal_distribution.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_off0000ffa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA6 5084 bytes
SHA-256: 7054ee58b9a72bddc82398d05c8d58abef8766f1f9fc40507d7803f093169dac
font_01_sfnt_off000110fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FE 10820 bytes
SHA-256: e08ae6da06e2739fc76742c48c44553abef072dfe91847f44c14a687ff3f5670

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