Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad8996b9290a87f0…

MALICIOUS

PDF

91.8 KB Created: 2021-01-09 18:48:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9cfe18a8948f681b83bc98290f428a79 SHA-1: 30a429ea406f989f7364c4e5ec8c29682e65d0ff SHA-256: ad8996b9290a87f041e686f1ef775d27d443ac9ffd0d99297b0f00f74eefb090
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as phishing malware. The document body, though heavily obfuscated, contains text related to movie downloads, suggesting a lure. The presence of numerous disposable links and link farms indicates a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffe.ru/aws?utm_term=beiimaan+love+full+movie++480p PDF link annotation
    • https://cdn.sqhk.co/wolitobutak/cnhjZji/pefedanunin.pdfIn PDF document text
    • https://cdn.sqhk.co/xozakatupab/TfohbL2/la_liste_rose_paroles.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409619/normal_5f98e4f89c205.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/ichdiah/33507495420.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452193/normal_5fdd6d8fe2204.pdfIn PDF document text
    • https://site-1177446.mozfiles.com/files/1177446/81631148189.pdfIn PDF document text
    • https://site-1166618.mozfiles.com/files/1166618/64904631077.pdfIn PDF document text
    • https://zevejekigo.weebly.com/uploads/1/3/4/3/134374512/karurivapapizu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471969/normal_5fe5338662940.pdfIn PDF document text
    • https://figapizezedop.weebly.com/uploads/1/3/4/3/134364787/1acee10e31612.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408481/normal_5f97e2575b5c6.pdfIn PDF document text
    • https://site-1168486.mozfiles.com/files/1168486/wololo_song_mp3_download.pdfIn PDF document text
    • https://wejusapud.weebly.com/uploads/1/3/4/6/134614256/rubagolem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.orgThisIn PDF document text
    • http://www.fontrix.comhttp://www.nhncorp.comIn PDF document text
    • http://fedorahosted.org/lohitIn 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
    • http://scripts.sil.org/In PDF document text
    • http://scripts.sil.org/OFLAbyssinicaIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE478 5304 bytes
SHA-256: b8b00262f76f6e155d6dbd9f6ed070af8d82d89e31453346578e5da53cb5c386
font_01_sfnt_off0000f67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67F 20968 bytes
SHA-256: aa890c11d31957efca0fd402aa72a454fd9b4193136962196ca6c8da92cd1596
font_02_sfnt_off000116ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AE 2276 bytes
SHA-256: 04d00fe4d3d1cfb13f6c45ea00a1a16b92fe51d00c0709aca980b96f225372d0
font_03_sfnt_off0001207b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207B 11508 bytes
SHA-256: 6d249edf6cd4b93a7fdf4942abd9fcb753c959d7fe9a28f41b697a98bd8ce373
font_04_sfnt_off000146a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146A3 2056 bytes
SHA-256: 2e46b36fed23876ebb6e11f7a152916482bd8967c060a582f04975efc8a71266
font_05_sfnt_off00014f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F96 4456 bytes
SHA-256: 715b74a3ff73f979ee642721e9c7213c6d8951c250e5d052991e311bf038fd0e

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