Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffb14045bea517de…

MALICIOUS

PDF

80.9 KB Created: 2021-03-13 14:46:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: edbaf40e525316a7dfcc29172486593e SHA-1: ac67e009140c125100d4df7c8204bad3262977f5 SHA-256: ffb14045bea517de071ebf921def79bf40716335ee663ce99fa8343fcec921e7
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The embedded URLs and the heuristic firings point towards a phishing or malware distribution scheme disguised as a utility.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/award?keyword=pdf+to+word+conversion+online+nitro PDF link annotation
    • http://rowowesofazov.medianewsonline.com/6878756199.pdfIn PDF document text
    • https://rupogasonewu.weebly.com/uploads/1/3/4/6/134653860/morelovopipud-tezozulewezonis.pdfIn PDF document text
    • http://gadatoreneperil.mygamesonline.org/properties_of_exponents_practice_edgenuity.pdfIn PDF document text
    • https://tovagaru.weebly.com/uploads/1/3/4/5/134587520/e1de1b9b79.pdfIn PDF document text
    • http://myfoxing.online/906871938664ckov.pdfIn PDF document text
    • http://sewonmedix.ru/dulivatepidgxzdm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495854/normal_5fefa7a42e39c.pdfIn PDF document text
    • http://topshops.website/resumen_el_arte_de_la_guerra_sun_tzu_por_capitulosk14hj.pdfIn PDF document text
    • http://zabemaladameg.medianewsonline.com/how_to_use_graco_snugride_35_without_base.pdfIn PDF document text
    • https://melesosinipedo.weebly.com/uploads/1/3/4/4/134475371/bivovazolalato.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380411/normal_5fd06699d3a59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376610/normal_600ecd60c814f.pdfIn PDF document text
    • https://bilujadaju.weebly.com/uploads/1/3/4/7/134772480/folapineduv.pdfIn PDF document text
    • http://top-salez.site/56973748690gb8d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384482/normal_5fea3071f196c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://8271b8e8-1520-4b18-8785-2fafc8cd33e6.filesusr.com/ugd/efc97f_27c2b3c684444f7a95f96744d9851aae.pdf?index=trueIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_516783a556ac4413bc357418efe73774.pdf?index=trueIn PDF document text
    • http://malejubu.myartsonline.com/8890541437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37b04523-3bab-4b43-90f1-9138b7e6fc8f/are_macro_lenses_good_for_portraits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c750317b-0cc7-44a0-8228-c776f73f7a5c/jinax.pdfIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_da4beaf91585438890275d1b896dc507.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ec0f27d-c2c5-4cf2-a7fb-8b7668944f52/5652879909.pdfIn PDF document text
    • http://sajulugebimisu.myartsonline.com/mega_construx_probuilder_masters_of_the_universe_castle_grayskull.pdfIn PDF document text
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_9e20b0a5ede64f239a5e3f976ea755a7.pdf?index=trueIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DA 4748 bytes
SHA-256: 2b26380cf69a2a468f42a046b76a60edb3a6f23585c4842789318ab62e0892cc
font_01_sfnt_off00010218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10218 10640 bytes
SHA-256: fe7c282822592417cf1acd9c04f2d4ffccc6f101d81962c70edffb2dd1f082d7
font_02_sfnt_off0001264d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1264D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378