Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfab1e78286d953e…

MALICIOUS

PDF

86.7 KB Created: 2021-07-31 16:45:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: dcfeb010a3dad56c0ad9964bd61eda07 SHA-1: af67180ee316de1857239ac0d7f92f6f21392ed7 SHA-256: bfab1e78286d953e89e154e8a01a3d456c6932bebeebe3b5470d5d46418e7180
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier with high confidence. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution attempt. The embedded URLs are likely part of this lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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 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://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/8bq4oenu2dii27eppur37daa8t/dujemajefoli.pdf In PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/jajedolurelaz.pdfIn PDF document text
    • https://kiaavcilar.com/upload/ckfinder/files/joxeka.pdfIn PDF document text
    • http://ingfrimale.com/userfiles/files/nevawufetisuxet.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/29404448469.pdfIn PDF document text
    • http://furniture83.com/upload/files/37353552893.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/92380627620.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/bkkvf6aaqfst1po4il2qqea6ot/22850821909.pdfIn PDF document text
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/noderidowedog.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/34537775505.pdfIn PDF document text
    • https://rivieresoceanie.com/ckfinder/userfiles/files/12811968470.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/1mp82iqv06eqel0rlhq7b3vup7/24940223082.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/qpctuh8mdhoih2p3snlo6qfhnv/76087272681.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ae389e638d2---xopaxalur.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/zodejiximolav.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/64s7o7ir8pbe4mdmrk79rou6u5/ranidusedokidevarelawu.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/e170607da3af27c07409efec77428af2/67477624506.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/g527p329iue38gn83vgg1of5a8/vises.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/pakunerivinuroxumaleguze.pdfIn PDF document text
    • http://catherine-massage.com/ckfinder/userfiles/files/80414958208.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/50759541349.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/90889602449.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/54416958185.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/wowek.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/23092690043.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=cuales+son+las+medidas+oficiales+de+una+cancha+de+voleibolPDF link annotation
    • 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_off0000edc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC3 17464 bytes
SHA-256: d6126e3481a0e376c608ca2c3821e3a9ab3caf91d67a221a26bc8d1943ff1629
font_01_sfnt_off000119e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E6 10880 bytes
SHA-256: 291c44dc77de3cb558a2470166dbe3c76eb0e64c442277002b5bd9c011c44323
font_02_sfnt_off000132d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1