Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2a63330cfb9114…

MALICIOUS

PDF

91.3 KB Created: 2021-03-07 04:32:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae8e508d923d3625c6ff80c23de599c5 SHA-1: 2289e42e78582f725fa0ce6ff01a024c014cae39 SHA-256: 0a2a63330cfb9114346bc18a7d3606f909870c7cd8dd53403fe6aa23a839c41f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are to suspicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to exploit kits or phishing pages. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to leverage external resources.

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-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://bologen.ru/wix?keyword=acta+de+reuni%25C3%25B3n+plantilla
    • http://zipubezexupoka.mywebcommunity.org/jipukoteguvuxoxi.pdf
    • http://shop-profildoors.ru/ppsspp_gold_1.8_0_apkz56qw.pdf
    • http://gagivukamuw.getenjoyment.net/curso_primeros_auxilios_psicologicos_coursera.pdf
    • http://erethiztzj.space/sokizazizikugv7b3.pdf
    • https://kopodeju.weebly.com/uploads/1/3/1/4/131483627/roterasozemedub_sizinobuwega.pdf
    • http://lnstagramoriginal.com/lofijuruwaseymdsu.pdf
    • https://zazejisodixad.weebly.com/uploads/1/3/4/3/134359446/2024348.pdf
    • https://liberiloro.weebly.com/uploads/1/3/4/5/134589576/vaduvivedosis-sotet.pdf
    • http://bumufirila.mygamesonline.org/joker_graphic_novel_harley_quinn.pdf
    • https://fuwivofopotafuj.weebly.com/uploads/1/3/5/3/135388640/zejozow-vapazuzagoxij-tepese-vuxozozewere.pdf
    • http://nanolenka.xyz/understanding_public_policy_cairneyuldqa.pdf
    • http://studytogether.fun/55279468477qjx62.pdf
    • http://vomimaforotagi.mywebcommunity.org/how_to_win_pick_3_lottery_books.pdf
    • http://lodomujimujug.mywebcommunity.org/kapodip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_137b9f5ea289495799c079de561ab6bc.pdf?index=true
    • https://e064a861-6c7b-46af-b67a-66be1f32d776.filesusr.com/ugd/ec3e4b_12ec30c3616e420891f77cb0dd902482.pdf?index=true
    • http://rixigor.onlinewebshop.net/55382502271.pdf
    • https://68420551-d949-41c4-975b-2ae86aa6d062.filesusr.com/ugd/09c3c7_c27b0130894a4f93ae2597705da61960.pdf?index=true
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_3a7a67eac57d425192723ad536d8abdb.pdf?index=true
    • https://f74ea38a-ab8d-49a0-8d31-9a1d7ce64423.filesusr.com/ugd/5ceade_71369fb3eb1245e68814ee6264616d9a.pdf?index=true
    • https://6e678f60-abc6-404c-883a-cd1729fdffee.filesusr.com/ugd/e4291f_0666b41498f44dd399f9d07fe2abb6f9.pdf?index=true
    • http://sitafefisoju.atwebpages.com/fazudulutemod.pdf
    • https://27f1a270-5048-4778-87f0-574dfe85248a.filesusr.com/ugd/b7306e_6bd00bd1488c418696fe66e99b412c49.pdf?index=true
    • https://0e8f88b9-656e-4b05-9cd8-8bd477f85547.filesusr.com/ugd/95b9ea_df6cc87c42ea4d35a5d2a9dba4ca18ac.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117dc.bin
36738c7a217c74d64dbad8d914c3ec8d2785ec0ba5b3a8eafcb11a3254d829bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117DC 4784 bytes
font_01_sfnt_off0001281a.bin
9c3bd92f27149f84b1ed1ff36ed28459cfb2d163f49cc9d46870e25e90e4a059		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1281A 12356 bytes
font_02_sfnt_off00014ffb.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14FFB 4324 bytes

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