Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b2f83081ff3fa26…

MALICIOUS

PDF

69.1 KB Created: 2021-03-23 22:55:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8e1f727f3808f16d1e858ed5988e1266 SHA-1: c598045966d2784c7c645ab6f8a470ab43067ce3 SHA-256: 2b2f83081ff3fa2672ed7b6f98cf090db498981297bc536e6bed6a174fc0fa14
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://zajinet.ru/wix?keyword=chapter+10+plate+tectonics+test+answers PDF link annotation
    • http://bluebadge-support.com/jubuvazetumixumanurui0knk.pdfIn PDF document text
    • http://thechambre.xyz/sudukifefe7qfow.pdfIn PDF document text
    • http://strgb2.ru/19293205452p5b4g.pdfIn PDF document text
    • http://meetlait.pro/beats_by_dr._dre_-_solo_pro_more_matte_collection_wireless_noise_cancelling_on-ear_headphonesqjs4j.pdfIn PDF document text
    • http://wiinorama.space/buzzfeed_harry_potter_house_quiz_yes_or_no8wgjf.pdfIn PDF document text
    • http://criticcxck.space/the_wonderful_story_of_henry_sugar_and_6_more81hyl.pdfIn PDF document text
    • http://fabulouss.space/the_hard_things_about_hard_things8vjiu.pdfIn PDF document text
    • http://instapriz.online/92805346267hksok.pdfIn PDF document text
    • http://thechambre.xyz/what_show_on_netflix_can_you_choose_what_happensp6j42.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://95049c82-e412-4913-a0b0-e03e83d5170a.filesusr.com/ugd/127d6e_4f15243e48cf4b45b2315ab71ec03d26.pdf?index=trueIn PDF document text
    • https://1e1f235d-56dd-4976-b20d-d38e3fe7b172.filesusr.com/ugd/210b45_eaefcc7be4ec4096bc32539dd57af310.pdf?index=trueIn PDF document text
    • https://9a89a7da-ede3-42eb-a537-7416be21eb2d.filesusr.com/ugd/aaaf79_8fbfd73d2eb74617b0379085bb5003d8.pdf?index=trueIn PDF document text
    • https://49d0234c-aae4-472d-9cb9-6192e9e03354.filesusr.com/ugd/a63595_a4864349296b49e9bdf150a4c02ba2a1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cae699e3-4a76-4551-b42f-f497abb421cd/cgp_a_level_biology_workbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/animus_harbinger_apk_obb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d6905b0-2aa2-4441-ab7d-ada7d08466e7/vukomavipazifalotimefowut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb4558d6-3ee5-44fe-95e9-ef0261b1e5e4/84444444456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e192e507-749e-4d09-a994-96722bef8fc8/97200671044.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/rupadegixisutorugutedan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e715cde1-4d8c-4e37-b5bf-f884fc76a24a/best_choke_tubes_for_stoeger_m3500.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_off0000d3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F3 5212 bytes
SHA-256: 6dc63bb13beb65ab27523482f66c13d5d5a11638993f2f454317b0ca4641f175
font_01_sfnt_off0000e5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B2 9824 bytes
SHA-256: 463f6146f7185e4e9288ee1cc3065a6f2972dbcf0a076e4f5458c995b9c06eff

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