Malicious PDF — malware analysis report

Static analysis result for SHA-256 076719d8606d7a8c…

MALICIOUS

PDF

81.8 KB Created: 2021-09-11 11:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9a3eb7264480d31d4d52963f3abb0dcf SHA-1: b826254c17a0e62005b3fecd6674af78e313ce2d SHA-256: 076719d8606d7a8c8957dafb7fdd0d15104345bd6379255a8e04fd56df3ceaac
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a spearphishing attachment, likely leading to a second-stage download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://synerhu.ru/uplcv?utm_term=how+to+configure+android+phone PDF link annotation
    • http://yourbuilding.ru/userfiles/files/jakefanuvedifafabupeso.pdfIn PDF document text
    • https://ego-sofa.tw/uploads/files/202108311930091063.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/95342159768.pdfIn PDF document text
    • http://tk-weld.com/images/library/File/zonuf.pdfIn PDF document text
    • https://0955205219.jwa.tw/userfiles/files/33266672344.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/82947589672.pdfIn PDF document text
    • https://hanakspotrebice.cz/eshop/ckfinder/userfiles/files/24010677130.pdfIn PDF document text
    • http://zuche0551.com/upload/file/3342780528.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161367b5802e29---tasinosiwirox.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/fozituw.pdfIn PDF document text
    • https://sabagdasarov.ru/upload/file/51646572077.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/482b7f55baf376985f33ed916f674358/31569995568.pdfIn PDF document text
    • http://mnarch.it/userfiles/files/9538063554.pdfIn PDF document text
    • https://matfplayer.com/calisma2/files/uploads/45603910019.pdfIn PDF document text
    • http://logicamail.it/draft/media/wogev.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b47ba87746---2555178376.pdfIn PDF document text
    • http://nemalipics.com/54293275121.pdfIn PDF document text
    • https://karaari.leaddeehub.com/userfiles/files/tunobo.pdfIn PDF document text
    • http://thaoduocquyhiem.com/userfiles/image/file/26650294823.pdfIn PDF document text
    • https://stthomasorthodoxchurchsouthpampady.com/userfiles/file/zofubuni.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613329ac0ff50---51427018709.pdfIn PDF document text
    • http://zl369.net/userfiles/file/95744033226.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/gagexisopenarizezizixaru.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d91d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF134 10864 bytes
SHA-256: 9683dc1fe09a8defb376b3eaf1644de09ade01342050e2114b2e81d0fca0cac8
font_02_sfnt_off00010a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0D 18020 bytes
SHA-256: d6f63c654486fc4736a134dd5d508a7f96c8c59567b9a6493e16a9db2ffc7d32

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