Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea2ad2fa0cc21813…

MALICIOUS

PDF

98.0 KB Created: 2021-05-31 21:06:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78a6b2f25368fb9f6a22914ce6f6a414 SHA-1: 295e664e8358e733e0fe7449135eb727cc844beb SHA-256: ea2ad2fa0cc21813a4566ea71def9d22a7c12398a225bb0e21b7b83fadc0e448
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed to attract users searching for specific content. The primary malicious URL, https://allytemp.ru/pbw?utm_term=wings+of+fire+telugu+book+pdf+download, is likely used to redirect users to potentially harmful content or phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://allytemp.ru/pbw?utm_term=wings+of+fire+telugu+book+pdf+download
    • https://cdn-cms.f-static.net/uploads/4393022/normal_605d23276699b.pdf
    • https://cdn-cms.f-static.net/uploads/4489835/normal_60393d4378c74.pdf
    • https://mifetajuluvonu.weebly.com/uploads/1/3/4/6/134610270/xejipipa-razeguditirevud-nosuxazasiga-semelevepamij.pdf
    • https://bulasekujamur.weebly.com/uploads/1/3/4/3/134377464/9539007.pdf
    • https://static.s123-cdn-static.com/uploads/4482869/normal_5fca929419fa5.pdf
    • https://cdn-cms.f-static.net/uploads/4408871/normal_6019b029e5e00.pdf
    • https://fixugosotodig.weebly.com/uploads/1/3/7/5/137518485/949508.pdf
    • https://lifeweroni.weebly.com/uploads/1/3/4/3/134358493/6096101.pdf
    • https://cdn-cms.f-static.net/uploads/4498678/normal_5fd3067789526.pdf
    • https://xutepodufolesik.weebly.com/uploads/1/3/0/7/130739265/10b7f8ef1083.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/c8cf8fad-800e-41d8-9b58-18b6c6a36eaa/my_kelly_services_jobs.pdf
    • http://wojipag.pbworks.com/f/54145092979.pdf
    • http://zepupifob.pbworks.com/f/what_is_the_latest_version_of_raft.pdf
    • https://uploads.strikinglycdn.com/files/f32e9d9d-b606-47d8-b605-9608ee88479e/pudowima.pdf
    • https://uploads.strikinglycdn.com/files/d4316f16-6a95-4972-a1dc-375b55fd5156/sony_wireless_headphones_mdr-rf985rk.pdf
    • http://xedidovetaw.pbworks.com/f/what_is_isentropic_work.pdf
    • http://sizolasipape.pbworks.com/w/file/fetch/144411414/palabras_agudas_llanas_esdrujulas_ejemplos.pdf
    • http://kipizasuzeda.pbworks.com/w/file/fetch/144416745/54315655209.pdf
    • http://zopujoxobug.pbworks.com/f/angry_neighbor_apk_indir_android_oyun_club_son_srm.pdf
    • https://uploads.strikinglycdn.com/files/7ff20966-fa2a-4836-9805-8fc9db32589b/dragon_ball_manga_reddit.pdf
    • http://palixazoke.pbworks.com/f/metefif.pdf
    • https://uploads.strikinglycdn.com/files/2a7250f7-9365-4969-90f4-20982c36d37f/eso_potion_essence_of_ravage_health.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f65d.bin
e0d62e2ca7e5792524054f57a8818d6fc8ff22e674d27086f60eaaa4bc393163		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF65D 5400 bytes
font_01_sfnt_off000108d0.bin
00d5ae5f38bdcc12da97724a15f9578593983ae608ef75d25e83e2bfc2fcc23d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108D0 29444 bytes
font_02_sfnt_off000147be.bin
2c18ade9d86399b565c6410b7a5b09d5d17f73f274350b03a48dd18f19e07228		 pdf-font-stream PDF embedded font (sfnt) at offset 0x147BE 10452 bytes
font_03_sfnt_off00016b6a.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16B6A 4324 bytes

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