Malicious PDF — malware analysis report

Static analysis result for SHA-256 8630ee6e4c4da92c…

MALICIOUS

PDF

100.4 KB Created: 2021-03-08 22:05:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1c24844061cd020b8644fe260912f82 SHA-1: 5526d9a5ad5017b55bb01d01851efbc6bf9e33bb SHA-256: 8630ee6e4c4da92ceda7779f279ecf7bfab306c32bfcf7e1a90a7f8f2bdc973a
156 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, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/aws?utm_term=which+would+have+a+permanent+dipole+moment
    • http://xigakusaruwu.iblogger.org/65634506579.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://d3826037-6016-486c-99e9-dc41bc666644.filesusr.com/ugd/b81754_d23b79d9f1304ffd87ead7b716356ec2.pdf?index=true
    • https://s3.amazonaws.com/lepefi/seek_thermal_compact_imager_for_android.pdf
    • https://uploads.strikinglycdn.com/files/ad9427d6-395a-48c3-b466-45873d3c1dc9/swg_pre_cu_leveling_guide.pdf
    • http://fidawakuxut.epizy.com/how_to_reprogram_dish_remote_to_hopper.pdf
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_a68c501bbea84b4fa8d187cd06b35d50.pdf?index=true
    • https://s3.amazonaws.com/safago/used_ranger_bass_boats_near_me.pdf
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_81df5fc03ae8492abdf237dc93c09b85.pdf?index=true
    • https://2c9641c8-5874-4869-9b94-f1378e60aa6b.filesusr.com/ugd/efc1f6_9c53286310c24e35baefcf87b105dc45.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a91d435e-8235-4eed-a210-cbc7d421e567/clash_of_fantasy_kingdoms_heroes_war_gift_code.pdf
    • https://s3.amazonaws.com/fujadabez/goodyear_assurance_fuel_max_review_consumer_reports.pdf
    • https://s3.amazonaws.com/jazofi/avast_9_virus_definition_update.pdf
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_f44a0ae670134fd29497b7e0a722fffd.pdf?index=true
    • https://f2203da8-4034-475c-a980-a37079f2cd7f.filesusr.com/ugd/d29026_1c47f36d8ff1451f8a4c9e49c1e16136.pdf?index=true
    • https://s3.amazonaws.com/bidivo/jurassic_world_the_game_hack_app.pdf
    • https://s3.amazonaws.com/mubemutolewe/56779632626.pdf
    • http://tukutuxobolekub.epizy.com/dijokerobajoximofap.pdf
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_3067e3ad2dba44a98511dd060c1019a4.pdf?index=true
    • http://rawuvotatu.rf.gd/adblock_android_tv_box.pdf
    • https://uploads.strikinglycdn.com/files/d8f3b3cb-8250-4380-b51f-4fcde9a76340/craftsman_2800_psi_pressure_washer_problems.pdf
    • https://49b821e7-ee7e-41b4-809b-d0417b8c1ddf.filesusr.com/ugd/927743_c43e8621251849e595b3f6f64edca587.pdf?index=true
    • https://s3.amazonaws.com/fadobirak/gossen_luna_pro_sbc_repair.pdf
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011edc.bin
5a9261242d862e5dea265441669bf134561805e5713480b3695ac23d0a9c9ad6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDC 5180 bytes
font_01_sfnt_off00013062.bin
f2d268a32f79564c4242903b06e8df6d465e2da8eea75161efca0774d3ebf11c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13062 14192 bytes
font_02_sfnt_off00015ff6.bin
b7820d7eabdaa02d41a0b1719e6bcfe8d0378183717e9c0865e733a21f54fb21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15FF6 16256 bytes
font_03_sfnt_off00017575.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17575 4324 bytes

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