Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0abb6c5316dad2b…

MALICIOUS

PDF

89.3 KB Created: 2021-06-27 00:20:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d4830985b9aa69262ae7037e8ecd0ea8 SHA-1: da414dadfe46419d570b79e658e5774ff40a65df SHA-256: a0abb6c5316dad2bb38de1885efb541aeec7dc14d313ff454ec870b3473a3acb
204 Risk Score

Malware Insights

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

This PDF document contains embedded JavaScript and a link farm pointing to compromised WordPress upload storage, indicative of an advance-fee scam. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into paying fees for non-existent prizes or parcels. The embedded JavaScript may be used to further obfuscate the malicious links or initiate a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://arerp.kr/data/file///32651690304.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/067dc6c7e1f9c55c163657b90f1d8e83/mikupuduxikapikusuxe.pdf
    • http://ibshop.gr/uploads/_uploads/files/73140807568.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609839904d13d---xaxuxizetusezapuvan.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607866baa853f---fafudajununibenolik.pdf
    • http://boekenwinkelindex.nl/images/uploads/jejusibekok.pdf
    • https://soudurelausiere.ca/upload/editor/file/29107044325.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/1f5f7do9gtvetenbb2ckuqmvbs/salaxorefosume.pdf
    • https://sheenabusesandcoaches.com/userfiles/file/menawoz.pdf
    • https://avigailpekelman.com/sites/default/files/file/5632719585.pdf
    • https://bistakalikotenetwork.com/userfiles/file/95218705007.pdf
    • http://highendschmiede.de/highendfiles/file/rabuniwowa.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/f2c589a15d7469fd3d6a9e0bd9b501f1/43687303215.pdf
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607acea2a1763---55576671314.pdf
    • https://octvads.site/js/ckfinder/userfiles/files/vobiguvinubuvijobo.pdf
    • https://avonsteel.com/UserFiles/file/77524276640.pdf
    • http://szzxwx.com/Upload/Upload/file/202162465111122.pdf
    • http://royalgoodviewresort.com/Uploads/file/36285985093.pdf
    • http://mosvag.ru/img/lib/file/powivovimos.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d128264c80---fesikodopozilagedada.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8d099f355---pazotigipavodedidekusoda.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/7pr4g7sa7cajn66pq8snuet1ne/fezuramunexaburasa.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086949b8e5c1---wesowenelagazamigi.pdf
    • http://servmed.net/userfiles/file/14228747982.pdf
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/a7u6fb4v1l6jmmdcdemrh0ma75/69972114585.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=cat4+test+answers
    • 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_off0000fe48.bin
9956ca5ad08bf9629b892339bad0817f3decb5ce5d38aba4ef1a408fe9980fcc
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE48 16672 bytes
font_01_sfnt_off00012940.bin
7facd0d89cc16b68650d8cce464d228ba152697124221db9a599e1fdca443539
pdf-font-stream PDF embedded font (sfnt) at offset 0x12940 10036 bytes
font_02_sfnt_off00013fd5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD5 16792 bytes