Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ce9534127d975a…

MALICIOUS

PDF

67.2 KB Created: 2021-03-15 09:42:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a29e4cd2b18346e92e31f36b352f6aee SHA-1: 7f47624e3a15d3eb244e7a4de0ad89f416a6b2d6 SHA-256: 22ce9534127d975a0b77c47488a1329b73dd8a8044bb38b534f8f686268a0b28
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics identified it as a link farm on disposable hosting, with numerous external URIs pointing to various PDF files. This suggests a tactic to manipulate search engine results or distribute further malicious content through a network of linked PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • 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://leonvi.ru/wix?keyword=head+start+logo+vector PDF link annotation
    • http://tasefuvakol.22web.org/stairway_to_heaven_played_backwards_lyrics.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/55559044819.pdfIn PDF document text
    • http://kismykeitio.best/billu_bar_bar_full_movie3emfc.pdfIn PDF document text
    • https://bewapuvin.weebly.com/uploads/1/3/1/4/131453684/f1baabcc3b.pdfIn PDF document text
    • http://kazaxukiga.getenjoyment.net/71377817600.pdfIn PDF document text
    • http://senteber.site/3384135205fy7qt.pdfIn PDF document text
    • https://kiwakobomu.weebly.com/uploads/1/3/1/4/131482833/1675759.pdfIn PDF document text
    • http://skidki-day.store/9755743824sb6ml.pdfIn PDF document text
    • http://prequester.online/protostar_joomla_3._0_template2miew.pdfIn PDF document text
    • https://wafewukim.weebly.com/uploads/1/3/5/3/135399971/0ab38.pdfIn PDF document text
    • http://sewakasatixori.medianewsonline.com/catalogo_de_perfiles_de_aluminio_para_ventanas.pdfIn PDF document text
    • https://navikeput.weebly.com/uploads/1/3/4/7/134755574/lofuwinozelov.pdfIn PDF document text
    • http://rimka.xyz/muramisanelemorami6fdc0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suxuxuned.epizy.com/89387638239.pdfIn PDF document text
    • http://puredaw.rf.gd/bodyguard_movie_phone_ringtone.pdfIn PDF document text
    • http://gamovomubapo.rf.gd/suzatonikerobidokabagepo.pdfIn PDF document text
    • http://nakunurigexu.epizy.com/jazapenidibupe.pdfIn PDF document text
    • http://wurunuj.epizy.com/kufujowuxobovagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01b2042a-ee44-42ea-8df0-6edbccb7d4aa/jisax.pdfIn PDF document text
    • http://guvodakar.epizy.com/3653298578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9688aed1-541c-4088-b4b1-5fd4d2da2b3b/portrait_photography_poses_female.pdfIn PDF document text
    • http://rilimopukalus.rf.gd/hoi4_man_the_guns_best_infantry_template.pdfIn PDF document text
    • http://toxenekotu.rf.gd/sinuwujabonudum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2b0014a-f08b-490f-9c4f-d7aa55756a2c/93083317980.pdfIn PDF document text
    • http://saxarivoje.onlinewebshop.net/hogwarts_a_history.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_off0000cb3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB3C 5128 bytes
SHA-256: 0ade1c0cf271353682b0a3aa718496af78b68590ddfe77ac563a6920361917e6
font_01_sfnt_off0000dcc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC2 10032 bytes
SHA-256: 52f0ef2160bde3d494771c1f9a4868e188168d1876f0b69146a48c3a5f62b9f2

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