Malicious PDF — malware analysis report

Static analysis result for SHA-256 d44e26f903a2f7a8…

MALICIOUS

PDF

77.9 KB Created: 2021-03-31 17:09:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 75a97ff3ec4dd88e9d15cdfd72bee22c SHA-1: 9cd480fc4c7d84910e40085dcc716b2c0386f62c SHA-256: d44e26f903a2f7a824b1e6e0ba4750bf65dededcc4abafa6ac538b1135abf41f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://nipisod.ru/award?keyword=atkins+phase+2+meal+plan+pdf PDF link annotation
    • https://bomoturu.weebly.com/uploads/1/3/1/3/131384468/3987606.pdfIn PDF document text
    • http://pazifelurup.medianewsonline.com/dell_rev_a00_motherboard_drivers.pdfIn PDF document text
    • http://zuvowizetigeko.22web.org/adobe_pro_for_mac.pdfIn PDF document text
    • https://zuwisikap.weebly.com/uploads/1/3/4/4/134441997/ae95ab13.pdfIn PDF document text
    • http://vinuporabomod.iblogger.org/68523621433.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e72deea9-3c4d-48de-8429-d2e8e2d5d9b3.filesusr.com/ugd/68b2df_81d01900034a418984c6f8df59635088.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e010acda-2645-4b50-9e69-85f556b1d872/joe_turners_come_and_gone_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/ic-746pro_mars_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a51e08e-c6e9-4d8f-a931-a1447fee2dc3/47804982763.pdfIn PDF document text
    • http://fusozevukatamir.atwebpages.com/napiwipetegozogenejujori.pdfIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_f79201aa10054664b50c30e35c65e80e.pdf?index=trueIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_3eeaf06ed7354e92bab68c9f13e21993.pdf?index=trueIn PDF document text
    • https://cfecb619-c0f5-418d-ae9d-b1147643389f.filesusr.com/ugd/4cd51e_2836df686f0b445db22b51eaa20b0f54.pdf?index=trueIn PDF document text
    • https://3bdad275-8828-414d-9063-9532e035d791.filesusr.com/ugd/c67d0c_a2f47b9020764a82a6aee158029314f3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pegozegi/abc_australian_tv_guide_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/xuboniwozuvujure.pdfIn PDF document text
    • http://fiwewenupod.epizy.com/gepelilifomi.pdfIn PDF document text
    • http://rewuwuja.onlinewebshop.net/borrador_duas.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_off0000f26c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26C 5372 bytes
SHA-256: e15b344c9f768c81a0626e09c4287abfdc7ef353c21d1c915807da8027c454a3
font_01_sfnt_off00010498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10498 11148 bytes
SHA-256: b300f1f1d8cd7a7c79444beaad567d6fb63ab325eec0fba985f4cb35b8e535c5

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