Malicious PDF — malware analysis report

Static analysis result for SHA-256 df91d43d343ac11f…

MALICIOUS

PDF

72.3 KB Created: 2020-12-30 14:11:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 615602c7614763d03c214c5353bc553a SHA-1: d258f1c1efba9bf54827f78fe260bfb8a3089ba0 SHA-256: df91d43d343ac11f3caae82423a3211cd2ea381a9c8e2c47c81d46e6c294a0d8
222 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with critical heuristics identifying it as a malicious redirector and a link farm. One prominent URL, 'https://traffmen.ru/strik?utm_term=space+commander+war+and+trade+mod+apk+download', suggests a lure related to downloading an application. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffmen.ru/strik?utm_term=space+commander+war+and+trade+mod+apk+download In PDF document text
    • https://fabexitib.weebly.com/uploads/1/3/4/1/134109013/vatog.pdfIn PDF document text
    • https://judurufag.weebly.com/uploads/1/3/4/6/134688768/xefozukidazafaxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409992/normal_5fded75d27eff.pdfIn PDF document text
    • https://kizifafub.weebly.com/uploads/1/3/4/7/134714450/xutimemukasoli.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/Xro58Tz/food_giant_pinson.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389797/normal_5f96830d8853a.pdfIn PDF document text
    • https://cdn.sqhk.co/sawusuzi/IMwAhjK/world_war_2_books_for_young_adults.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469847/normal_5fd10c8fae6a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366633/normal_5feb15688c30d.pdfIn PDF document text
    • https://gaburidukir.weebly.com/uploads/1/3/4/4/134463400/7339825.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/2a9e372d-e06d-4d81-830c-513569765f4d/veridian_blood_pressure_cuff_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/careers360_magazine_june_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/married_chat_rooms_free_yahoo.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/vafubavugikufexiperuxu.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/formation_professionnelle_carreleur.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_off0000ddc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC5 5300 bytes
SHA-256: 328f319fdca609bc339bbd238efa30934a90200c0bd7f71ab77e77a61a0828cb
font_01_sfnt_off0000efca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCA 10620 bytes
SHA-256: ee601603a006c5260239b7af5b0916ebc286ed8d8e4ecd81e314ddea5b5375e4

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