Malicious PDF — malware analysis report

Static analysis result for SHA-256 e924d49309957ab2…

MALICIOUS

PDF

78.1 KB Created: 2021-04-03 20:06:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 542c5609fc304805f872e5867595c2bd SHA-1: 5b9060f5511ac49b944abc8e7f92c8fda945ba87 SHA-256: e924d49309957ab2330b0eef1d5b7e8c207513ee9674a8f0314cbe27c0236c52
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain related to "awards and honours". Heuristics indicate this is a link farm designed to redirect users, and ML classification strongly suggests malicious intent. While no scripts were directly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution lure.

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
  • 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.
  • 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://jumiwimov.ru/award?keyword=2020+awards+and+honours+pdf PDF link annotation
    • http://tcerkovniekupola.space/kalutanukapelomutge38.pdfIn PDF document text
    • http://gatorama.fun/rilafox9ne6i.pdfIn PDF document text
    • http://3203epworthcres.com/wojijefovuzrrvz.pdfIn PDF document text
    • http://mediaverifiedbadge.com/enacfire_wireless_earbuds_manualz8clp.pdfIn PDF document text
    • http://vidclips.design/17027219641zuja2.pdfIn PDF document text
    • http://liko-sneakers.com/431821244341yeln.pdfIn PDF document text
    • http://g2am2e.xyz/panoteg15ue6.pdfIn PDF document text
    • http://1s.london/understanding_motivation_and_emotion_6th_editionckvrr.pdfIn PDF document text
    • https://zuzesewijolane.weebly.com/uploads/1/3/1/4/131406438/2284853.pdfIn PDF document text
    • https://zezonusadife.weebly.com/uploads/1/3/1/4/131410479/4f9d17.pdfIn PDF document text
    • http://redita.fun/anne_frank_powerpoint_tesfloa0.pdfIn PDF document text
    • https://tepiduti.weebly.com/uploads/1/3/5/9/135974730/ranano.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/kamiduna.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/jebokizez/53022252450.pdfIn PDF document text
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_bf575088934744789bfc28eb324b436b.pdf?index=trueIn PDF document text
    • https://b46c4cda-4951-41c0-816f-bbf02eee4d9b.filesusr.com/ugd/4ff992_d0db2bdf2ea4496ea85d5ca8e592988c.pdf?index=trueIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_56342a28e0594805bbd61215873b2408.pdf?index=trueIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_585b4efe8c3643308c97e84dba5c4baa.pdf?index=trueIn PDF document text
    • http://tizeruxabono.onlinewebshop.net/alto_sax_pentatonic_scales.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/what_is_the_average_diameter_of_a_chicken_egg.pdfIn PDF document text
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_8df2684a94774d2f8799b1165ea37f31.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_off0000f272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF272 5368 bytes
SHA-256: 271b5d3fef02fde9baca72a08f35e42ef85e92eb295ef38280bf404559f5bdb7
font_01_sfnt_off000104bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BF 10832 bytes
SHA-256: 051d8642b41c2e1d2fd541f5a7e26a4b2955abe14b7644afaf111650c2d09add

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