Malicious PDF — malware analysis report

Static analysis result for SHA-256 89eb320893a9cfb0…

MALICIOUS

PDF

85.1 KB Created: 2021-04-05 17:02:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d08bfea905692f4d0de189b1c9514d26 SHA-1: 7ebc378e13b03f345da65cc484782acd1afdfdab SHA-256: 89eb320893a9cfb0f9ee6bff2bc6e9b24bc0c6928204684369ba33c6de910d14
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a link farm, suggesting it is used for SEO manipulation or phishing. The embedded URL points to a suspicious domain, likely a lure for users searching for a manual. ClamAV and ML classifiers also flagged this PDF as malicious, indicating it's a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/wix?keyword=sandisk+sansa+clip+mp3+player+manual
    • https://cdn-cms.f-static.net/uploads/4496380/normal_60668fec502c5.pdf
    • https://cdn-cms.f-static.net/uploads/4449777/normal_602786d0036b2.pdf
    • https://cdn-cms.f-static.net/uploads/4401558/normal_5fd1c50a9d8bd.pdf
    • http://legiontry.online/synology_ds1515_resistor_fixve05t.pdf
    • https://cdn-cms.f-static.net/uploads/4385202/normal_6040677ddeec0.pdf
    • https://static.s123-cdn-static.com/uploads/4383795/normal_5febff1612fed.pdf
    • http://abouts.space/easy_boomwhacker_songs_for_kindergartenjgqkm.pdf
    • http://gouliwer.online/digital_marketing_course_online_free_in_hindivtdtw.pdf
    • http://rollernefrit.xyz/xutalinemrirqz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7e16a758-1b35-4495-9626-5376f1dc77be/how_to_build_muscle_after_40_male.pdf
    • https://uploads.strikinglycdn.com/files/15150719-e331-4d9d-b009-6898a52be317/nizivuligiwofuserodimotov.pdf
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_9088f52dff894d16b126c55292cb8d18.pdf?index=true
    • https://uploads.strikinglycdn.com/files/656efcca-c623-44d2-8924-51ed6fda5a95/naval_reserve_personnel_center_new_orleans.pdf
    • https://uploads.strikinglycdn.com/files/c1e54ca1-526b-412f-9aaa-24bec5a5e539/how_many_calories_are_in_a_medium_dunkin_donuts_hot_chocolate.pdf
    • https://s3.amazonaws.com/vovopafubipu/theory_of_relativity_for_kids.pdf
    • https://uploads.strikinglycdn.com/files/e71f9fd9-35c8-4523-93c4-fce2491afd6a/can_emdr_treat_ocd.pdf
    • https://45f91bdd-2b68-4e60-ae2c-b14373ae5332.filesusr.com/ugd/0d089b_81ef8c47206a4aec8e7492feab749259.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3e16665a-601d-4973-89c7-44abf7deb06a/25777789180.pdf
    • https://uploads.strikinglycdn.com/files/305af6ad-3d25-471c-8272-94686a2b83a7/nures.pdf
    • https://34fef40c-4934-4c56-b24d-59915ed92566.filesusr.com/ugd/806295_c63959a535634abeb7c480195ee0704a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e8abfbd5-2fdd-4e97-a894-b2e77f1f7a78/43157669023.pdf
    • https://s3.amazonaws.com/mosezavor/what_is_the_most_popular_version_control_system.pdf
    • https://8772a198-af03-49ef-8724-5feb7546cb8a.filesusr.com/ugd/436f04_5d05035fdac045e9b4a368ee7da80675.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fdd68d7d-4f45-45d6-af20-513f321963fa/59495910719.pdf
    • https://8a83ad47-1dc6-4e38-b726-138de0fe4a7e.filesusr.com/ugd/043c68_4ca44b5a54ee4a72aa1cb41171509562.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a95.bin
0f5ad4cb68b76d8b5164d201e98f313b72a1c92d4b6c5227a1cd54b24907c4fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A95 5652 bytes
font_01_sfnt_off00011dcb.bin
b79c4f5061e3761c96e09ea5f91d1b97ec0e65117760715e8d79ab347c5365ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCB 12084 bytes

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