Malicious PDF — malware analysis report

Static analysis result for SHA-256 60eefd2688c1ae89…

MALICIOUS

PDF

84.0 KB Created: 2021-03-27 21:25:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e5dc403eb0be106c977f1516102d52cd SHA-1: 0d6b3c9bc3d626bcc86aa2b6dbeef491a91ba78b SHA-256: 60eefd2688c1ae8978aacfe7544c3f700963dd81882abfa36b0c6284f15dfc0a
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/award?keyword=dipole+antenna+theory+pdf PDF link annotation
    • https://cdn.sqhk.co/xeposetuge/aOuo0hh/85603120385.pdfIn PDF document text
    • https://cdn.sqhk.co/merodobiweve/bidijmu/othello_character_development_essay.pdfIn PDF document text
    • https://cdn.sqhk.co/kugorazig/xAja4wx/gas_prices_map_near_me_diesel.pdfIn PDF document text
    • http://carluxepaint.site/xokunezetezunugit7phjq.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/five_nights_at_freddys_game_online_unblockedpup4l.pdfIn PDF document text
    • https://mexukisigugat.weebly.com/uploads/1/3/4/7/134702857/d8cdd2d2e93.pdfIn PDF document text
    • http://whalesqpa.fun/ctet_question_paper_20203auhx.pdfIn PDF document text
    • https://konevumi.weebly.com/uploads/1/3/4/3/134399330/ruzovaso_razawo_vodosufekuf_fokokolob.pdfIn PDF document text
    • http://petrol-v-pol-price.site/kariginorakabufonutovqh36.pdfIn PDF document text
    • https://vaxamapex.weebly.com/uploads/1/3/4/0/134017084/tupuweparonoge-venujozezowuf.pdfIn PDF document text
    • https://jalesebexiw.weebly.com/uploads/1/3/0/7/130739560/00f6ff92.pdfIn PDF document text
    • https://vikurevago.weebly.com/uploads/1/3/1/6/131606257/ea930fe32.pdfIn PDF document text
    • http://epipog.com/ayman_sadiq_cv_formatiswxp.pdfIn PDF document text
    • https://judikojegewag.weebly.com/uploads/1/3/4/5/134583508/dukabujepa_laxomo_nunuxi_tukapowog.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/9addad8c-7792-47c9-89bf-e09930787b5d/what_does_a_computer_network_technician_do.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87c13caa-8e96-46c4-a0e5-fd420695a419/polaxajizaforologo.pdfIn PDF document text
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_454620a4a3e44c4b8cbe74cc230e00ff.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/65b4c235-57e8-42e5-841a-a31f035e3ee0/the_alienist_cast_season_3.pdfIn PDF document text
    • https://9e1e9198-0fe7-4103-8084-fdcc6befb8d5.filesusr.com/ugd/2f7815_01b39899914646818161e274dc920755.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/851ebf7e-12b5-4564-af5b-12d7daf831bf/shape_of_things_to_come_song_yardbirds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8899cbd-3274-4962-9ecd-1665f4c3c45f/54247775452.pdfIn PDF document text
    • https://0778d94d-b67d-49c3-8f6f-43f52d6edec9.filesusr.com/ugd/b85eb0_71dd978c7e974c748cf2e1d09525cfcd.pdf?index=trueIn 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_off00010d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7B 5052 bytes
SHA-256: 865e1d78d59fbe8f546a1e46533214395d6d4218ebf6582b7611396563cbc810
font_01_sfnt_off00011eb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB5 10424 bytes
SHA-256: 5c071c5ea6cbcb7797cb5fe16f09fef223bf7a6c9eb07f98b2303914cfa5f7e1