Malicious PDF — malware analysis report

Static analysis result for SHA-256 97a5273da93c310e…

MALICIOUS

PDF

80.3 KB Created: 2021-03-19 17:27:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0536199062afaf7440eed8c2d55eff4d SHA-1: dfdfdd71984d07e8c9353ad4d6db9e9a2f50093c SHA-256: 97a5273da93c310e28081a1de9bb9e47771957817c563a4f85ce60b4e0451624
244 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics, including a critical finding of a malicious redirector link and a PDF link farm. The document body, though heavily obfuscated, contains text related to 'Amazing spider man apk download revdl', suggesting a lure for potentially unwanted or malicious software. The presence of numerous external links, many hosted on disposable domains, indicates a strategy to distribute content or redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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=amazing+spider+man+apk+download+revdl In PDF document text
    • https://vozidetuvotivex.weebly.com/uploads/1/3/6/0/136094215/966913.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/25414754410.pdfIn PDF document text
    • https://zimegusak.weebly.com/uploads/1/3/4/6/134605775/b5aa0.pdfIn PDF document text
    • https://xolesozetenosox.weebly.com/uploads/1/3/1/0/131070434/791b89427058.pdfIn PDF document text
    • https://jimiduwukav.weebly.com/uploads/1/3/1/4/131452794/tifegulab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408851/normal_5fe949413a624.pdfIn PDF document text
    • http://zutumufedige.getenjoyment.net/metric_bolt_grade_markings_and_strength_chart.pdfIn PDF document text
    • http://niwadeg.mywebcommunity.org/kubota_bx_weight_box.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483833/normal_603c50c96a9aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419415/normal_604e21220677d.pdfIn PDF document text
    • https://xuvamifete.weebly.com/uploads/1/3/0/8/130874567/8307311.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_601fd028357f0.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/600bb2ff-55b9-46ec-a99b-d51613882743/dinosaur_fossils_printables.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58f19119-876a-4f64-80de-35450380a186/fuderegoxe.pdfIn PDF document text
    • http://zuzeburim.epizy.com/jason_fung_the_complete_guide_to_fasting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/791b08d4-4a07-4fb0-b397-c05563042c7f/the_kid_who_ran_for_president_read_aloud.pdfIn PDF document text
    • http://sokurunofizune.rf.gd/harvard_referencing_style_quick_guide.pdfIn PDF document text
    • http://kiboxanemez.rf.gd/tobot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a137274-2911-4e65-9c37-1884c45f5fa0/what_are_the_duties_of_a_program_coordinator.pdfIn PDF document text
    • https://08202b68-adf4-4b7d-bb06-fcebe54c78b8.filesusr.com/ugd/76dd3d_8970cbdc37eb4431b9a4f20c6016a964.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/61ee11bf-6f7b-4a64-b9df-f2315cc61daa/escuela_psicologica_estructuralismo.pdfIn PDF document text
    • http://refusunono.onlinewebshop.net/33569510135.pdfIn PDF document text
    • https://d71fc03c-aea6-48f7-a990-8afffb22108d.filesusr.com/ugd/3de8a6_6e30e2861eac44b79c8909e33f5f6baf.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_off0000fbdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDC 5536 bytes
SHA-256: adf343084ee2813b015795e076b3369bca38210067ddf1ba7d07f48e44d9ea57
font_01_sfnt_off00010eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB9 10916 bytes
SHA-256: a40ffacb54f2ff99fdfd22f8a9c87072e792b8b54991c8c7c97af47f37ffa8e1