Malicious PDF — malware analysis report

Static analysis result for SHA-256 c079321476d709f2…

MALICIOUS

PDF

91.9 KB Created: 2021-07-29 11:18:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bc86969916682bb35f7f2f839dcc38dc SHA-1: c449135cab4412a0727e243ca1ae1a0ab5a57870 SHA-256: c079321476d709f28e501b306b817c163a03adc36d99753cc102af7e1f6e3f3c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The presence of PRC/3D content and ML detection further supports its malicious nature. No scripts were extracted, but the primary attack vector appears to be directing users to external malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 8

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://huntic.ru/uplcv?utm_term=granny+mod+apk+1.7+3+mod+menu+download+outwitt PDF link annotation
    • http://hockeydh.com/files/ups/files/favifegud.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/dc2377f7685c7c61d3245f3d9b2964dc/fisopedizupu.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/nulexevukavab.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/kimojexameronapavef.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/i8430ogdos2466l1r62ohfe7s5/falojolisepegolu.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/dalopipetu.pdfIn PDF document text
    • http://www.brickchamber.com/ckfinder/userfiles/files/7253110367.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/felomakajirulo.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/79960652410.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/varegamadidizupa.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/2204294195.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/5c8e751264e894379bcc415d032c4a1d/wixoneges.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/43805263487.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/35489237391.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/9d0bba45292c5878ad5d349165880c2d/78400473444.pdfIn PDF document text
    • https://alariel.be/userfiles/file/45462726673.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/53054248128.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f3a9236f3---dusafozixaf.pdfIn PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/mobata.pdfPDF link annotation
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cq2q8oq6i1nbaqaum4h2u5hbl4/82428399819.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/jt91ajdp1gd2b760p9biih2vu5/26341432831.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcb90df5cd---50325554812.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/80591368931.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/3998e38e1019114e23973102bb35fd1a/63468784638.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C3 28840 bytes
SHA-256: 72d84b56a1ee0b5d89e6e6226353cf380ae61b2f98eda7c1012193ca23ffa3da
font_01_sfnt_off00012d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D6C 11156 bytes
SHA-256: b57ef9967aa649b382e5c32e916a1142e97fee4bb3d7a188148b2d8e3d2b763a
font_02_sfnt_off000147a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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