Malicious PDF — malware analysis report

Static analysis result for SHA-256 e96aaf7f340f3def…

MALICIOUS

PDF

85.1 KB Created: 2021-03-12 11:16:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 6589eb483259b55a5a9d900f9831a20f SHA-1: 5322d2a71ef425377ec3b8bbcc96d4b3e8754b2a SHA-256: e96aaf7f340f3defd5881f554fe5f7dbfc098b292b0995147d607f48d7e0c105
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. ClamAV detected it as Pdf.Phishing.Trojan, and ML classifiers also indicate maliciousness. The presence of external URIs and the link farm heuristic suggest the document's primary purpose is to redirect users to potentially malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9887

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://xajibur.ru/123?utm_term=android+onedrive+sync+folder PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489969/normal_5feb109089080.pdfIn PDF document text
    • http://paganel.world/baby_boy_names_based_on_book_charactersatf92.pdfIn PDF document text
    • http://pigalimiru.medianewsonline.com/kupadumedogoli.pdfIn PDF document text
    • http://yourcy.com/38419285034m30jc.pdfIn PDF document text
    • http://dikagowoxi.sportsontheweb.net/11916331940.pdfIn PDF document text
    • https://gemiporelowagi.weebly.com/uploads/1/3/0/7/130775846/jakutulal.pdfIn PDF document text
    • https://tetemubegogik.weebly.com/uploads/1/3/4/4/134443084/vuwadutal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374983/normal_5fe2e9129f49b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481161/normal_602d044e632a2.pdfIn PDF document text
    • http://peskomment.ru/ditikajupamena83fbr.pdfIn PDF document text
    • http://fusekimutoxi.sportsontheweb.net/76317492841.pdfIn PDF document text
    • http://latencfsrt.space/can_you_turn_on_a_panasonic_tv_without_the_remoteqxfea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470020/normal_604137a751159.pdfIn PDF document text
    • https://nalakipivexovob.weebly.com/uploads/1/3/4/3/134385055/3547734.pdfIn PDF document text
    • http://korsabarca.com/sinazut7f7wq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404745/normal_604a9a9790041.pdfIn PDF document text
    • https://sunajojafexa.weebly.com/uploads/1/3/1/8/131856627/5118811.pdfIn PDF document text
    • http://ompala.store/html_color_names_and_hex_codes803bw.pdfIn PDF document text
    • http://indital.fun/22226556058thc1x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zirutabu.myartsonline.com/65944442312.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/lakers_trade_news_bleacher_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/startup_business_plan_ppt_template.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/31146640025.pdfIn PDF document text
    • http://zenakezogutomu.onlinewebshop.net/52436524031.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/new_ben_10_game_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/74869762764.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEE 4664 bytes
SHA-256: eab8c490c63d98432128e92fc2c55c2c001d19004a192893ab154cfd07f4409d
font_01_sfnt_off0000fdcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCF 10536 bytes
SHA-256: b740fc09cd631e6f0c7a7489498c53f9ea1962baef37857d631943ce822f2907
font_02_sfnt_off00012217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12217 16364 bytes
SHA-256: 3d4749d6100daadf53acbf3b8f0af377f764a48496e0806ab6baa0478a5fbb9e
font_03_sfnt_off000137ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137EA 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c