Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3a703dad74fd65c…

MALICIOUS

PDF

69.7 KB Created: 2020-12-28 13:29:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 34b24875fe8b61a5a53ad01474c3d1b4 SHA-1: 93cf967d1b9e8a9099775437fdbb53828bfc48d4 SHA-256: f3a703dad74fd65c844c13c22b1cf0dcd44bf3be8e2aa026b5d4f61503dccc11
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and ML classifiers indicated a high probability of maliciousness. The document contains a large number of external links, many pointing to PDF files hosted on services like sqhk.co and weebly.com, suggesting a link farm or redirection scheme. The embedded URL `https://traffine.ru/strik?utm_term=transparent+screensaver+mac` indicates a potential lure for users searching for screensavers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://traffine.ru/strik?utm_term=transparent+screensaver+mac PDF link annotation
    • https://cdn.sqhk.co/goluxewimabu/Li8Ugih/87004459281.pdfIn PDF document text
    • https://pibiwija.weebly.com/uploads/1/3/4/8/134896476/5960088.pdfIn PDF document text
    • https://cdn.sqhk.co/pamomusemida/h8ngcic/73594305513.pdfIn PDF document text
    • https://cdn.sqhk.co/bugabowozi/9ieific/19100015226.pdfIn PDF document text
    • https://cdn.sqhk.co/zazavoxujub/cLheIrs/cut_sb_off_meaning_in_arabic.pdfIn PDF document text
    • https://cdn.sqhk.co/xetorexevapi/hajf4ew/8107208905.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/ejbzNia/65758202054.pdfIn PDF document text
    • https://cdn.sqhk.co/mokavokaven/RIMDVpm/reckless_getaway_2_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/vetesomiw/jhM7CLb/crowded_city_in_the_world.pdfIn PDF document text
    • https://pulatufulufu.weebly.com/uploads/1/3/4/6/134610330/vegul.pdfIn PDF document text
    • https://mojikusabuja.weebly.com/uploads/1/3/5/3/135301399/burape_muvideravezuro_winotufogu.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/9674f1df-ff13-46c1-80fe-7084a39a621f/roberto_carlos_singer_now.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89a87d51-81b9-459d-8182-39e620e819bd/wafadezebojufefip.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_off0000d50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50F 5056 bytes
SHA-256: ac6833a4a0cbda462b873c226ec96476160a169bbf4efa669fbb32c1027b7f6d
font_01_sfnt_off0000e630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE630 10676 bytes
SHA-256: 0cdd1015cd056c2f555fbe0e6dd93442bd1b610ff012a21fa82d8579e76c731e

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