Malicious PDF — malware analysis report

Static analysis result for SHA-256 e054a567b6833b2f…

MALICIOUS

PDF

68.0 KB Created: 2021-09-06 05:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 72ea710c01dc7a2a5dc55964e8520d27 SHA-1: ddaa812c456fe992f95969b445691ab4d3f097ae SHA-256: e054a567b6833b2f0f27795d5edd711533ab25bebec98357976f5eef559f1788
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and a machine learning classifier, exhibiting characteristics of a phishing lure. It contains a high density of external links, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content or download further malware. The document's structure, being image-heavy with minimal text and a click-outward action, strongly indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/17e8abdf5a948d36d648fe19a5bda6b6/lapawisaletupofil.pdf In PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/gupisogepodomifeb.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/0b80e60def5b642d07a105fe54fbbbb2/tuzasekevofatukizavi.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/p2g4dv6bsof738oa009n5at5a3/sowutalinetugofiwokizuwi.pdfIn PDF document text
    • https://stancijanegrin.com/UserFiles/files/68026936425.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160713bdb57668---43681689446.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbeed217f4---vexenuxen.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/gufetusiwexavavuwuxu.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/nirixowuveveworak.pdfIn PDF document text
    • https://aykutemlak.com/upload/ckfinder/files/zimuzekosikebekive.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/51967893887.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/zaropufip.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/86163514767.pdfIn PDF document text
    • http://offerseir.com/basefile/offerseircom/files/vefarumelaniwigobaz.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/1bbee489afa03a30da93915c6ae1c96a/lakigud.pdfIn PDF document text
    • https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/38dus1u8jf3un0c2d8vk978835/63774206315.pdfIn PDF document text
    • http://okuninka-biale.pl/userfiles/file/duwilozirotuligiw.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/b1ecb50acfb4946af870447f0a695de5/jadutudetulowomijexew.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c93d98a8ce---fojujifowaduvedowig.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ba1702063---78857786583.pdfIn PDF document text
    • http://www.smwiarus.pl/ckfinder/userfiles/files/51467944863.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/48305829298.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a65d507e5---8527933555.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=los+toreros+worksheet+answersPDF 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_off0000b0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0CA 10200 bytes
SHA-256: 928c36f191e03f9e394728bb660df924b26dab1e1a87a90c5f508edbcb49905a
font_01_sfnt_off0000c7b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B3 13844 bytes
SHA-256: 17c039798bd2a42939880d5b88ef36ccf31e87883aa4a3fb7b0ff3a1b43640d2
font_02_sfnt_off0000e9ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1