Malicious PDF — malware analysis report

Static analysis result for SHA-256 a71fbbba467a0cd1…

MALICIOUS

PDF

100.5 KB Created: 2021-06-28 09:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aa785950a97f118b5e2a07f7419e48e7 SHA-1: 0296f84e219a06c25c2e7e9cea869bd0f0f88e9d SHA-256: a71fbbba467a0cd124e02c9b904c01c621ca5a3698a7a733f50a23fafd82ecf1
196 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam. It contains numerous links to external PDF files hosted on compromised WordPress sites and disposable domains, suggesting a phishing or redirection campaign. The document body, though heavily obfuscated, is consistent with lures used in advance-fee fraud schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=2020+high+country+2500
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/a23de016fc22c2a2ca4fc5c7cc00092d/gomebexolutudoni.pdf
    • http://winecellarkeeper.com/ckfinder/userfiles/files/vipafarujon.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/765c1c05a7fe9413ec184d08e4696051/26866826618.pdf
    • https://avenue102.com/uploads/file/60219242996.pdf
    • https://mosconi.net/userfiles/file/23217699606.pdf
    • http://4grd.com/cmsimages/file/tagusirupezawuloxolani.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801e7805f29---46854628555.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d381c1f2062---nikaj.pdf
    • http://matstravel.ru/userfiles/file/53611567210.pdf
    • http://www.allatpatikapecs.hu/images/file/kiridofinasupexixifoz.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071b9ce23e3c---gegitogazip.pdf
    • http://basaritarim.net/admin/editor_resim/file/kijajezuxesataxozedirujo.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/ab616fe69974216c8d6bab895c7e9141/rebiravoj.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccf1d09ee1d---50634358888.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c94d8c5360f---47339914743.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0bfe1205ed---wopevunepometokakuzegaga.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/ftmaqtikn74fkhfqnou6adjmc2/bufejar.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094713175bb8---89436092189.pdf
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e88c0091a---94022397383.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f3410522b---34486815390.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607733393aead---65260072206.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c953f077d7f---bugoruwavitibakidafarat.pdf
    • http://akkoryazilim.com/userfiles/file/tepovikajewawudotozux.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607afa89c6a6a---sizedipopoluvajuz.pdf
    • http://cuspsurgeons.com/userfiles/file/40467780794.pdf
    • 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_off000122a2.bin
62a25cd468eca429a31c78b9974e5bd1af055e541362aa1fce5d07c744803b6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122A2 18764 bytes
font_01_sfnt_off000154e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x154E6 16792 bytes
font_02_sfnt_off00016cfd.bin
f7ffdba4dc88ff678b6933e5e2adcfcf44f8a6a47497728fab8a8b0c25945a01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16CFD 10492 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.