Malicious PDF — malware analysis report

Static analysis result for SHA-256 9202aac272fdbc51…

MALICIOUS

PDF

64.5 KB Created: 2020-12-20 03:38:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8987026fb638a0344e9af774bf269c75 SHA-1: 3cb5fa0d3f7f829406386d0b0e329a94e068e9b4 SHA-256: 9202aac272fdbc5154b0241dcd4fbd081dd102aea8f822004e1a99b01a3c0157
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the heuristic firings indicate the document's primary function is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/123?utm_term=verizon+home+connect+manual In PDF document text
    • https://suguzavajud.weebly.com/uploads/1/3/4/7/134744383/1452693.pdfIn PDF document text
    • https://xiwapidijiz.weebly.com/uploads/1/3/4/5/134511693/javidojuxibawodekuti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451019/normal_5fb3437896771.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454056/normal_5fc40dca8ca70.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/sugosubexez/78422419687.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/nizega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8756741d-d54d-4332-aedc-384c582e5eae/fifegenolopefivepad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f9df9bc-1091-46b2-8b52-d4a250687035/57903073471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47ffbde5-7445-4bf7-8c7a-36898b57ed47/safabekamaxekolevefoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c337b666-971b-48d7-aeb4-f25bdf34d011/madalutagiwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c0221bd-46b4-44b9-8d50-37977417c5e1/mugazukapuso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cbf158b-06c5-4500-a62d-d5305f5a2fef/muxeralub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43fa1491-7614-4c7a-af0c-8eee7470ec64/what_does_the_windmill_represent_to_the_humans_in_animal_farm.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/xavidepakebikel.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_off0000c037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC037 4876 bytes
SHA-256: 0381ea4bb3d99f75252fabbf75b43ce1fc626c88ea84bee3e6cf2daa03b2a5f9
font_01_sfnt_off0000d0a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A7 10760 bytes
SHA-256: 6bdca2221146eb2face3bff0663101f82f21d14350828e8714e6ae5fc6270a71

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