Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ff5fb4ddd234d9…

MALICIOUS

PDF

81.6 KB Created: 2021-03-19 11:17:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 722963f1952e6effb2f1b7ab8360447b SHA-1: 081f9994998ec6742530f1000ef9b23cdbf3c3e3 SHA-256: f5ff5fb4ddd234d93c3f1e1d9f088aabbfb87660d0adda6e27e786f9a25dcd32
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful sites. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' indicate the document's primary function is to drive traffic to these external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://lozipotod.ru/123?utm_term=block+puzzle+jewel+app PDF link annotation
    • http://maxist.ru/nidisasokorefakuziwoliiptcm.pdfIn PDF document text
    • http://dhl-order.info/the_case_for_christianity_cs_lewis0t1fj.pdfIn PDF document text
    • http://swiss-gear-top.xyz/38308212968557wf.pdfIn PDF document text
    • https://daradila.weebly.com/uploads/1/3/1/4/131438164/lirigo.pdfIn PDF document text
    • http://twirlini.com/soap_cutting_machine_price_in_nigeriaih4hu.pdfIn PDF document text
    • http://fullstacket.online/95542931508qxhac.pdfIn PDF document text
    • http://rubisteq.online/32307236995wnvy9.pdfIn PDF document text
    • https://womominajarizu.weebly.com/uploads/1/3/5/3/135392323/5340542.pdfIn PDF document text
    • https://remogomati.weebly.com/uploads/1/3/4/7/134748537/jabafe.pdfIn PDF document text
    • http://raisinsapp.pro/statistical_learning_with_applications_in_r29zl3.pdfIn PDF document text
    • http://femuxeririta.mygamesonline.org/pazoronafovolasadifi.pdfIn PDF document text
    • https://valowitezud.weebly.com/uploads/1/3/5/9/135993777/lakanawagekaba-divudalegose-fojojatevuse.pdfIn PDF document text
    • http://vibijinit.scienceontheweb.net/automatic_exposure_control.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/05093f90-a64a-4f07-b8bb-fdef95829880/redefotoluxinijavuvajubo.pdfIn PDF document text
    • http://zulolabopel.myartsonline.com/algorithme_de_tri_shell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3e8c348-74ad-4a34-a540-d7689b9cc83b/delete_google_search_history_iphone_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a39e2690-6d7c-4509-831b-0a3a6e49ebf3/gidakijugulidofisowosewi.pdfIn PDF document text
    • http://negumigimewote.onlinewebshop.net/alberta_township_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fcdf2e9-73a4-4363-ab0b-9ff9081cd1ae/kuwemosipoponuvifevegi.pdfIn PDF document text
    • http://gakilasefit.myartsonline.com/16532341947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ab173b3-1f8f-4521-9eb2-ae6bdf91f83c/38809200880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce426115-dd47-4707-89e0-416f7a2bf394/probability_of_simple_events_worksheet_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15855222-c91d-45f1-b86e-76471c8d3b33/epson_730hd_bulb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2614d62-c8a4-4734-ad28-6da794dad796/what_is_qms_subwoofer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F9 3376 bytes
SHA-256: d428e4edc8baffbc30ef7f509b39f296214b7073588b961733203d46c340b642
font_01_sfnt_off00010216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10216 4984 bytes
SHA-256: b1b7797ef681f7b49cde46ec85a83159eec12e8c6d495f60dbc7162155eec973
font_02_sfnt_off00011342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11342 10896 bytes
SHA-256: e21da64f4f195f7af66d97525db587a9f37ddf08b5cdca57f870a38155b30d0e

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