Malicious PDF — malware analysis report

Static analysis result for SHA-256 a49120ecf0e13d87…

MALICIOUS

PDF

125.0 KB Created: 2021-03-22 17:15:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b691ce971be65eb435e23034492af406 SHA-1: 1fb259883cf90f7de1defc81a5bf30447f324d2e SHA-256: a49120ecf0e13d875dc37464f6e36cb40ec91f80fc8bba9fc30b56370c13be85
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links to external PDFs hosted on disposable domains, suggesting a link farm or redirection mechanism. The presence of a 'download button' lure and suspicious external URLs indicates an attempt to trick the user into downloading further malicious content, likely a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 8

  • 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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://jumiwimov.ru/wix?keyword=arabic+live+tv+apk+2018 PDF link annotation
    • https://kopaluzakiletal.weebly.com/uploads/1/3/0/7/130739322/4be9495bf3.pdfIn PDF document text
    • http://fabulouss.space/why_wont_my_hot_tub_turn_onl7plz.pdfIn PDF document text
    • http://securitycheckingbrowservkcom.xyz/52534191053545vt.pdfIn PDF document text
    • https://lizodeva.weebly.com/uploads/1/3/5/3/135342900/konovomajov_begonet_neponisesulepog.pdfIn PDF document text
    • https://lexizade.weebly.com/uploads/1/3/4/3/134368494/soluso_josorexitoraf_bevemegisajax_jotakuxukoxa.pdfIn PDF document text
    • https://jadusulad.weebly.com/uploads/1/3/4/7/134764450/jonuvo.pdfIn PDF document text
    • http://pixelbarista.com/538299506074inti.pdfIn PDF document text
    • http://legiontry.online/light_it_up_lyrics_lukecailf.pdfIn PDF document text
    • http://changepass.online/candombl_de_angola_nao_cassangegwr09.pdfIn PDF document text
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/zewapazitujuni.pdfIn PDF document text
    • https://rogapasutidubu.weebly.com/uploads/1/3/1/4/131438129/9890289.pdfIn PDF document text
    • https://worowisirokisid.weebly.com/uploads/1/3/4/8/134856274/29bd202fc56eb.pdfIn PDF document text
    • https://wamibujobaju.weebly.com/uploads/1/3/4/7/134716207/darajumoneteb-bikupux-lodajox.pdfIn PDF document text
    • http://adminhalil.com/jump_force_giorno_dlc_costzbw0t.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/gagagakigibapo/carrot_soup_nutritional_information.pdfIn PDF document text
    • https://b615eccc-4413-4b1d-8109-ede925130a83.filesusr.com/ugd/0994f9_c981655201ef488490ad6375871c7591.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jupoti/20919836932.pdfIn PDF document text
    • https://6c036dbd-b327-4678-b778-de8a2ee7bb50.filesusr.com/ugd/ed64d2_f1976b914bd2456da99d0c1d74c626fe.pdf?index=trueIn 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_off00018bf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BF9 5524 bytes
SHA-256: af216bdbc018408969f0b0b4d96cf8119a6cc38e2085f576ba548b41fcb3f863
font_01_sfnt_off00019edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19EDD 13136 bytes
SHA-256: eae9309fead4b03e42eea0381653f2eed37c2a1d0aa0e44a432d7f493db55b2b
font_02_sfnt_off0001ca24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA24 16092 bytes
SHA-256: 2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140
font_03_sfnt_off0001ded9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DED9 1736 bytes
SHA-256: f27f1dab863be407bc80ce69f069aaa000ada345c50a5fba1d6b915b5f603bb6