Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b6df5d271ff94b3…

MALICIOUS

PDF

72.7 KB Created: 2021-02-28 01:12:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 8901080f26af3704a7e38ffc3cf6f0a3 SHA-1: 5c9880888fdf9d14f8e51ab305873b6e30b92b9b SHA-256: 6b6df5d271ff94b35123f414780f31384d29d191b3a12e5c1a07199eb100d95a
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or redirection mechanism to distribute malicious content. The document's content, though heavily obfuscated, references 'iroot apk mirror', hinting at a potential distribution vector for Android malware.

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 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.
  • 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://seumenha.ru/wix?keyword=iroot+apk+mirror PDF link annotation
    • https://dakuwiremab.weebly.com/uploads/1/3/4/9/134901294/tujofabixuxuxex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473622/normal_60047d2808632.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/why_is_the_gnostic_theology_rejected.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/fezikamajesakaxoli.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/aeiaaML/interesting_facts_about_human_body_in_telugu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476758/normal_5ff4c542c0373.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/fBTScE7/make_sentences_with_words_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409417/normal_5ff593b3d1704.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407576/normal_5ff28cfbec8bf.pdfIn PDF document text
    • http://jisetatiloro.scienceontheweb.net/how_to_train_for_basketball_by_yourself.pdfIn PDF document text
    • https://cdn.sqhk.co/xusovatovu/jihfY6G/umc_hospital_emergency_room_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/Oijagdl/afc_space_shooter_apk_mod.pdfIn PDF document text
    • https://bogonifad.weebly.com/uploads/1/3/4/1/134108647/nulotonemexepuzuw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486743/normal_5feb222dd65cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388841/normal_602094e46d7a1.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/sinejugusadizuxulufe.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/robumuduluwise/79157422375.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/89816725488.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/android_studio_change_jdk.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_off0000e202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE202 4756 bytes
SHA-256: 4b865ad1c4776912a628a29bfcb546585fca423f0a6d471d20dde6ad1c0e6eb3
font_01_sfnt_off0000f217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF217 10460 bytes
SHA-256: 864a71fccd33b3279ecf4a0dab3760b830d24e8e5678f25c46515e61545568a6

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