Malicious PDF — malware analysis report

Static analysis result for SHA-256 44ddae5278f7d684…

MALICIOUS

PDF

85.8 KB Created: 2021-10-06 17:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 89aa3601ddfea10777d5bc285e0306b7 SHA-1: 167c321d19d151e7f440fae43d31ff42b29a2f54 SHA-256: 44ddae5278f7d68431494d42c9884d91e8728d3e0b743070b315f51b5075ef95
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://kujainspectors.com/candyticket/uploads/page_images/files/36625221295.pdf In PDF document text
    • http://paroissedementon.fr/upload/files/5830485120.pdfIn PDF document text
    • http://vvk-wiedermann.at/userfiles/file/19598290586.pdfIn PDF document text
    • http://fratellibeninca.com/images/file/tezakegeserijasawuwaj.pdfIn PDF document text
    • http://lysfyyy.com/upload/files/18575910372.pdfIn PDF document text
    • https://forumhrdbekasi.com/webroot/userfiles/files/69012629945.pdfIn PDF document text
    • https://alubiasdetolosa.com/files/galeria/files/80631768240.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/3aafsokcabki3iama57stuv2aq/63401316691.pdfIn PDF document text
    • https://pracowniatechart.pl/fckpliki/file/wanumepewixorako.pdfIn PDF document text
    • https://oazapiekna.com/zdjecia/fck/file/70152310859.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/mazivepew.pdfIn PDF document text
    • http://gibisch.biz/files/files/fuvurituxe.pdfIn PDF document text
    • https://avistravel.ro/userfiles/file/98652840563.pdfIn PDF document text
    • http://dragonspond.com/uploads/files/rojaxi.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142156951d35---zopudowetetumosibuwu.pdfIn PDF document text
    • http://hawaiisushi.iorderfoods.com/uploads/files/55384053862.pdfIn PDF document text
    • http://nurugelexport.com/ckfinder/userfiles/files/gofuvevonix.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/b04db659bfde6b716884bbde06686b32/zivunepelujo.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/47006467766.pdfIn PDF document text
    • http://hieuchuan.com/upload/files/muduxotadapijugu.pdfIn PDF document text
    • https://cepatdaftargroup2.com/contents/files/rafemuropenobuxu.pdfIn PDF document text
    • https://devisme.maxtis.com/userfiles/file/togegakelidizawipasepo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=real+wife+storyPDF 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_off0000e701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE701 19296 bytes
SHA-256: 87b4286190cae275e05ba1a704a31f934f576b470af2126dfe00fa5f6ee297e5
font_01_sfnt_off00011a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13221 10348 bytes
SHA-256: 0e7719d08eec9d782dd561f8cd87e1ad770042e333561f097735ca2ca6fc45d5