Malicious PDF — malware analysis report

Static analysis result for SHA-256 daffe8f884619545…

MALICIOUS

PDF

77.1 KB Created: 2021-06-01 05:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f15d68302993a5cdde32f07123b95117 SHA-1: 243643b0936e7db8a3203a8226317609d445f1ae SHA-256: daffe8f8846195452c621f84391883a19fde9a122a85587fbaa4fd3a7fb705d3
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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://soxebez.ru/123?utm_term=ielts+10+reading+test+1+answers PDF link annotation
    • https://nironaguvotu.weebly.com/uploads/1/3/4/5/134530025/d8797119b66.pdfIn PDF document text
    • https://bumibosawo.weebly.com/uploads/1/3/4/3/134374517/944aa62d8.pdfIn PDF document text
    • https://xijaxerunoseme.weebly.com/uploads/1/3/4/3/134306079/newaripez-gopezugojajojam.pdfIn PDF document text
    • https://gawejewigedek.weebly.com/uploads/1/3/2/7/132741035/4bcfe24f062.pdfIn PDF document text
    • https://fukuzemuk.weebly.com/uploads/1/3/5/3/135306557/1254496.pdfIn PDF document text
    • https://wotowabe.weebly.com/uploads/1/3/4/6/134688823/moxazaw_zulidix.pdfIn PDF document text
    • https://garowenin.weebly.com/uploads/1/3/4/6/134662298/4f879dcb2e.pdfIn PDF document text
    • https://jebilazi.weebly.com/uploads/1/3/1/8/131856389/8628707.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/fc08184d-f821-4334-9902-e5b0cbde3967/what_is_the_true_meaning_of_the_name_christian.pdfIn PDF document text
    • http://gulisapil.pbworks.com/f/robert_kiyosaki_fake_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e1e1c58-4900-4ed2-8f4e-35ae5761d0fe/gabeturujoz.pdfIn PDF document text
    • http://vawaguzidatu.pbworks.com/f/is_eating_too_much_fruit_and_vegetables_bad_for_you.pdfIn PDF document text
    • http://jesababa.pbworks.com/f/lafavebapomawuvevakatepo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5e84330-b7d0-4b8d-af8c-fa889304a339/photo_movie_maker_app_download_for_pc.pdfIn PDF document text
    • http://xedidovetaw.pbworks.com/f/price_volume_mix_analysis_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d32b8042-e9e2-423b-980d-dc82c3fc3423/18317928751.pdfIn PDF document text
    • http://garigor.pbworks.com/f/sunken_city_warcraft_3_walkthrough.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5655b698-60d1-4ac7-a3d1-3b81e23858fb/tipunip.pdfIn PDF document text
    • http://wisarazed.pbworks.com/f/34233877987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba434fbb-8bba-4096-8d70-11b77cb74377/48790203003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84747304-c383-47de-bad8-fb6e4aeef760/51608589275.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_off0000e1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E5 5216 bytes
SHA-256: 62f5d528fc12a6bf3ac8a618e87b2757198c05de614aa8c9fd7acb9a2ecbe566
font_01_sfnt_off0000f3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C5 23252 bytes
SHA-256: f91ad8102929cd859477bc738363281c6de09c04c5c558dac8c6d437187b429d

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