Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad67819e52f1528…

MALICIOUS

PDF

88.0 KB Created: 2021-06-28 02:20:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 86140183b8f5ed325a6c1ce1fd4be957 SHA-1: 384f7239d756bdb00e8054a5595d66eeeab07793 SHA-256: 1ad67819e52f1528399a0ec0ad400201d070ec37f2203bd302b42cccc3821036
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution lure. It contains numerous embedded URLs pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The PDF structure and the presence of external URIs indicate a tactic to exploit user trust through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/6d706a764fa79937e93489e3e7ae1589/81645148555.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076bcd49d141---3160850075.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160843742498cd---61816850519.pdf
    • http://titusrelay.com/clients/e/ef/ef304ccc03541e9e6382bef5f13b0a7d/File/refofidawewureritexegesa.pdf
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608992a8932ba---89211453785.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/4a71e5786d8ace808cade06f5c9b2747/rutixupaxivavitabi.pdf
    • https://alshaabcoop.com/userfiles/file/powoduxugevebogaz.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcdc7e1b5b1---vefigapugumut.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160972bdb96bd8---15035602936.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/80b2b9987a753e0aef7df4d6847e2ed0/tapagowigef.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/74f27d4d8aba61142e0919404ae86983/86494556701.pdf
    • http://h-st.nl/bestanden/files/21420076052.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/e9e9mln9ogrpdsp7ckjcmlhmvf/redubevawolasapibuninali.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/67f2i99mrtba6ric0b4ssningt/puwejegemurunosoxunuselu.pdf
    • https://mudraconsultancy.com/uploads/files/67145245983.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/7719ec94e398b3dd8de36590be22ffcf/30315712233.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818cdc16dbf---6896358576.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087283099363---80760140613.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609af8fc8e4b2---jovalagu.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a1855204b81---vekonijajawoxatovuzivof.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/473cb369adbd2942d754783aec3e1500/351710098.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=how+to+clean+shave+your+balls
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f528.bin
d6959791b2040c87015a5096c6f9b23558d478abaee86e5ee0263c4250ba4191
pdf-font-stream PDF embedded font (sfnt) at offset 0xF528 10732 bytes
font_01_sfnt_off00010ddb.bin
997f7b46bc188690040a89d97a671e8527a68d4eacf7e12f3eeec5c99da9fa15
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDB 17244 bytes
font_02_sfnt_off00013aef.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13AEF 16792 bytes