Malicious PDF — malware analysis report

Static analysis result for SHA-256 60379fef3c3de19d…

MALICIOUS

PDF

80.2 KB Created: 2021-02-16 00:40:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0f7f5fa60b05fbdfd61a3bbb286701d1 SHA-1: 675969772a8233ed4de29695204d93433c69576b SHA-256: 60379fef3c3de19d5e60fa1ce392c32c23f77b560c581850baaaeea97acbd4b3
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded links, with the primary URL pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to English irregular verbs for children, likely a pretext to disguise the malicious links. No scripts were extracted, but the embedded links are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://yafferge.ru/strik?utm_term=verbos+irregulares+en+ingles+para+ni%25C3%25B1os+de+6+de+primaria In PDF document text
    • https://cdn.sqhk.co/rinilafexowi/Uhbjgyr/icy_veins_frost_mage.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/2iahjge/guilty_crown_season_2_episodes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459035/normal_6006e425330c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373753/normal_6014848314444.pdfIn PDF document text
    • https://karimimeri.weebly.com/uploads/1/3/1/1/131164281/5299925e.pdfIn PDF document text
    • https://cdn.sqhk.co/bapuwanuvadi/icEjfhf/carrying_boxes_on_back_of_car.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/ijuH9jj/70757040473.pdfIn PDF document text
    • https://cdn.sqhk.co/pafatewodoju/yEkMvih/midarifoguxabuposiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447253/normal_5fcebbe44ec54.pdfIn PDF document text
    • https://cdn.sqhk.co/vekosozob/62Msjdt/wix_logo_maker_video.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460066/normal_5fc9e14921078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480161/normal_60190ca44dddd.pdfIn PDF document text
    • https://gunubamevozapub.weebly.com/uploads/1/3/3/9/133997290/gukenupevewu.pdfIn PDF document text
    • https://cdn.sqhk.co/vixonafom/6ifihjd/70823493554.pdfIn PDF document text
    • https://duwujesipegon.weebly.com/uploads/1/3/4/8/134883919/roxokanu.pdfIn PDF document text
    • https://viduxetejogat.weebly.com/uploads/1/3/4/6/134600114/955383eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD568 5552 bytes
SHA-256: 33fa01322d3aa9ecd0d3a4bfa923af4d91ea5cefe934d88f77dc8fcf33fa7469
font_01_sfnt_off0000e7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D9 11448 bytes
SHA-256: 765ca465c91453c23ac56c93f9557b84f996f7e732ec6daa601a545f334550e3
font_02_sfnt_off00010d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6C 16076 bytes
SHA-256: 41ab8e378623f83282e2d7833f508692ad3021c6ca3ef2c12a4ae2f55b68dfa2
font_03_sfnt_off0001221a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1221A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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