Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2ab6a58a0ffe75e…

MALICIOUS

PDF

83.8 KB Created: 2021-06-30 22:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 81e5b4a3f6aae740885e501944250e15 SHA-1: 42fdf48e311aeeee70119180be665b644a2ef393 SHA-256: c2ab6a58a0ffe75e588bbc66b9278e628d3160e3ba851d28fcec244c6560a418
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. The PDF contains a link farm pointing to multiple compromised CMS upload directories, suggesting an attempt to host malicious content or phishing pages. The presence of numerous distinct hosts and the use of 'utm_term' parameters in some URLs further support a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://aldea.work/wp-content/plugins/super-forms/uploads/php/files/a31f14b066c22641e9566793d9dc946f/80577794969.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085aae5341e5---33649904298.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/nenowufoj.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608b09cfe9f34---nafidiz.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae6e3d4529---gidutokezevoxetimefagab.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/8vmgjhpvr6qrmgp5b0tn569u27/32403785315.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160d893223e1f4---93651306445.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c1026205cd6---85932207429.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3ea98a23a---89674641433.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16072422e49e1f---zusokevi.pdf
    • https://airshow-bg.com/file/tibijodetoporazeju.pdf
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/0dac66238d8aa24980b61e89607e258a/12542701905.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4432889448---nevonosaxadivukefepupogo.pdf
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/f72e21df01a182689a7ed518d7634671/liwofuwelorupenukebalabo.pdf
    • http://sys-svinding.dk/userfiles/file/wikipuvijalikupanamoloxoz.pdf
    • https://beysukonaklari.com/ckfinder/userfiles/files/witalafut.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608d436589d5f---tejasadovonuvip.pdf
    • https://wagaskar.com/media/18229840560.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/59ba9dd5e7a40b8788d92704a359ae13/45277348679.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/k8mgobuqoaeev65b3oagak00le/madizeveteritaditekokiga.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/3f5fb8e5ca3b8a435409b7f5dbf9d6e3/81420238806.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/d8277658766205157908869ed58e0f55/pejevafesudij.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=finger+joint+replacement+cost
    • 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_off0000e5ab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AB 16792 bytes
font_01_sfnt_off0000fdc2.bin
7611b5323a49556a75924896eff7e993f0f6cb5b1868ecd68cd2971668896fe1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC2 10824 bytes
font_02_sfnt_off000116a3.bin
d9cfd0b4136756c9eb3f2e38e3bac228bc3cf01a5fc2d1880987bd4f30d6525d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116A3 16728 bytes

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