Malicious PDF — malware analysis report

Static analysis result for SHA-256 6386072298d476eb…

MALICIOUS

PDF

67.8 KB Created: 2021-02-20 08:59:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c3e337eb002130d94da7407a0180b337 SHA-1: c9c5b51835e9c6d48821356d3ba5757fd5bc7eb6 SHA-256: 6386072298d476eb679f1aea61ceb7df07458fc0989cff39b9479abc9ea3d2e6
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/wix?keyword=gta+san+apk+data+300mb', which is likely intended to trick users into downloading malware or phishing for credentials. The presence of a PDF link farm heuristic further suggests malicious intent, aiming to distribute or mask malicious content across multiple URLs. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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=gta+san+apk+data+300mb In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420449/normal_5fd266c81d5d0.pdfIn PDF document text
    • https://wunepilupizuxo.weebly.com/uploads/1/3/1/8/131857535/9fe932691.pdfIn PDF document text
    • https://wisemawuperu.weebly.com/uploads/1/3/0/7/130738751/wegilowefekado_furet_fiwatab_woxetuvono.pdfIn PDF document text
    • https://riwurarelix.weebly.com/uploads/1/3/4/4/134484082/745d434d3cf470.pdfIn PDF document text
    • https://nimafomu.weebly.com/uploads/1/3/2/7/132710507/vamepawuge.pdfIn PDF document text
    • https://xibuderopugef.weebly.com/uploads/1/3/4/0/134042602/1619603.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377938/normal_6025275fb97d1.pdfIn PDF document text
    • https://wivutukezed.weebly.com/uploads/1/3/1/4/131438473/jiwemusijo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459059/normal_5fd7b73491c9e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/simujix/wotor.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/tateruva.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/64978947418.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/85628751820.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/likeminujuniwane.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/nifunugivejate.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/5_stages_of_public_policy_process.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/bexogifawag.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/nirimijivitetusixivodu.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/boy_hairstyle_photo_2019.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_off0000cdc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC4 5516 bytes
SHA-256: 4feb64922f80dcda220fa4ae9023adafc13418d189ec4d3465682563ee3a7127
font_01_sfnt_off0000e074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE074 9972 bytes
SHA-256: e493a7eea44b191a80a326dadaffb7e4f4ac057050a9f94b7149d434ce83f302

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