Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2268695e9185a22…

MALICIOUS

PDF

87.3 KB Created: 2021-03-23 00:57:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 87a25d0cf3b56cbb73efce6ec656db5b SHA-1: 42c42d8737f612fb5ea6b001cff8e3d04cfe08a2 SHA-256: a2268695e9185a22f56ec90ba50761ff74d334176224bdcee213bb0679835fd0
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified by heuristics as PDF_URI and EMBEDDED_URL. The URL `https://jacksth.ru/wix?keyword=nfs+hot+pursuit+apkpure` suggests a phishing or malware distribution attempt, masquerading as a download link for a game. ClamAV detection and ML classification further confirm its malicious nature. No scripts were extracted, but the presence of external URLs indicates a likely attempt to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://jacksth.ru/wix?keyword=nfs+hot+pursuit+apkpure PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460072/normal_6011be7751ee1.pdfIn PDF document text
    • http://sesizuxewewax.mygamesonline.org/analogies_test.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377663/normal_5fc9cc67c8f8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369332/normal_601bde47a9b8e.pdfIn PDF document text
    • http://guparob.mywebcommunity.org/atari_2600_adventure_manual.pdfIn PDF document text
    • http://vopukisavenif.medianewsonline.com/38193829989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476282/normal_603b39eaa8fdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469643/normal_60145cc4123b5.pdfIn PDF document text
    • http://vexoxem.scienceontheweb.net/adobe_after_effects_cc_classroom_in_a_book_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460463/normal_602541b090791.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/luxelula/26377453205.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/rodapusekowo.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/72185750363.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/app_themes_for_android_studio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2df1b7bb-cfd1-494b-b84b-d8d334341442/tasil.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/74849697203.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/18856303661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a05422c7-40d4-40cf-9a03-a110df870215/muzolikavugegupenatuvutes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49f497bf-cf82-48d7-99dc-397aaf5114ad/is_panda_express_orange_chicken_bad_for_you.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/4003985299.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/morgana_guide_s9_mid.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_off00011918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11918 4988 bytes
SHA-256: dcf440a2afa71e535cd142e33b07152271b23349ee39f0988bcb860bb35333a3
font_01_sfnt_off00012a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A15 11252 bytes
SHA-256: e29e85cbb15793098041db6eca790c2691a41c92e733fede9dc066ad39c4d2fb

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