Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e2a0ab0efa89369…

MALICIOUS

PDF

105.2 KB Created: 2021-07-16 08:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2bf4ca17fa03af30f95f75fd8b212104 SHA-1: 95b8bcf32014cfbdf28eda4a0b1c3d1c5e05738f SHA-256: 3e2a0ab0efa893694c62f675009209f0f9b14ec521066fb4b419336254802526
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 likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting. The document body is heavily obfuscated and unreadable, but the presence of numerous URLs suggests a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9687

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c5851435942---2946955557.pdf
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/buximejizufoberuxu.pdf
    • http://patanamachine.com/imgUpload/files/goteguvugevezigafonagur.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160e8e1e46a850---bamavuje.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb39d7c79c5---numopomasonedonesi.pdf
    • http://swaminarayangm.org/userfiles/file/firok.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094cdaaa78e1---xotixumibi.pdf
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/46a26cb19c9946cac26a20521193c632/sumolezofokaz.pdf
    • http://www.vegagastro.pl/upload/file/82784952715.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/e34d8895f201bceaa9bdbd709f35ccc9/2816432740.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/rqq18v1al3sd4of14qs6a5kbvc/vopejejuxa.pdf
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/901e7844f8edb552a7fc5bf129dc739f/40422851911.pdf
    • http://aelma.com/sites/default/userfiles/file/23282593412.pdf
    • https://uleiuri.ro/userfiles/file/bakomoxowetotowabenik.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a15059b45f9---nerufevudapetojuf.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606e1e65ac099---gatimajo.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/fcc806772323f8e01ec5be11e5be8fbb/zonaniwazetopiwosono.pdf
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e23eef0b7e5---wawakaxow.pdf
    • https://amblamy.ee/upload/file/lomomikaruwunet.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/a69efjq9adh8040oivq30vtn1i/3409862498.pdf
    • http://woods-china.cn/ci2/userfiles/files/20210713212732.pdf
    • http://osoboebludo.com/ckfinder/userfiles/files/jifopisobo.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160da2fb0e1c10---49995441307.pdf
    • https://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/musibofiz.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=composing+meaning+in+english
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000151b6.bin
d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x151B6 18328 bytes
font_00_sfnt_off000101bd.bin
ef84f8d1f1f467ab05a6cd033f93f25badcaa315ac9bd61a7e8134e566f949c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101BD 22508 bytes
font_01_sfnt_off000139a5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139A5 16792 bytes
font_03_sfnt_off00016f4e.bin
a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16F4E 3464 bytes
font_04_sfnt_off00017cce.bin
3e38fd4d67eb342ebbc7304c218e299daab2b5efa21239f366de44ec9ad9b1eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17CCE 10532 bytes

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