Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd02e6c3b3bd3ae…

MALICIOUS

PDF

80.5 KB Created: 2021-03-07 21:56:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 16d28c29af1665fe7f2fe53c03349278 SHA-1: 28568e8514bf2b15bda0394df46b9684cddea524 SHA-256: cbd02e6c3b3bd3ae2c843cd8fa35abc30a3a9c4109aec81fd0edce972b3f886c
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://ponafet.ru/aws?utm_term=how+do+you+program+a+harmony+650+remote PDF link annotation
    • https://cdn.sqhk.co/pananumujo/iQtC0he/ddpai_mola_n3_manual.pdfIn PDF document text
    • http://xonanudo.iblogger.org/74382536964.pdfIn PDF document text
    • http://vuvakaduvev.iblogger.org/fenumexererosinop.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/ghg0VtM/world_of_dragon_simulator_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/kupuruvew/Ujdn3gf/kupifuwiza.pdfIn PDF document text
    • https://cdn.sqhk.co/ketifoseja/e7sx78b/yeezy_350_carbon_release_date.pdfIn PDF document text
    • http://golepikoxeware.22web.org/72303966119.pdfIn PDF document text
    • http://tikonazab.iblogger.org/fozukunekavuta.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/wyieG7f/rt_america_news_hosts.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://7c5e2310-e79b-429e-9f4a-70471a43dcce.filesusr.com/ugd/8ec1ef_1a440efc22c44aabacf1390628ac8f9e.pdf?index=trueIn PDF document text
    • https://667abc8f-92ca-45d9-bc9d-789c80a68858.filesusr.com/ugd/dcd78f_a66a932718e3487c838ed68e721e911b.pdf?index=trueIn PDF document text
    • http://nopobakuso.epizy.com/2005_toyota_camry_owners_manual.pdfIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_a48f1ac029fe4a2f9e1768d6e3335c40.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4d07c7b-9b51-4cc8-ad1f-e46539e96c87/what_does_to_pimp_mean.pdfIn PDF document text
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_c86e09f39b3c41859b9bfc02b1d3518c.pdf?index=trueIn PDF document text
    • https://54c00800-e679-4366-bb5f-6c4fe2fc45d7.filesusr.com/ugd/3bcfef_c0ad464549c14bbd87d230b5855bc681.pdf?index=trueIn PDF document text
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_62fa088c7bf749b4bb6a5ce1a92ce1a4.pdf?index=trueIn PDF document text
    • https://7ec9ed57-df89-401a-953b-45744c150cee.filesusr.com/ugd/6e3131_d2286dcaba444ea8abe9b34cfcf0a543.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e678acb-4215-4136-99df-ff1cbb479672/gufawawazazupakiladaroziw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4726ee67-6854-4ec4-82da-e3bcf95fca31/fresh_off_the_boat_meaning_urban_dictionary.pdfIn PDF document text
    • http://kofupugixujodin.epizy.com/oxford_english_spanish_dictionary.pdfIn PDF document text
    • http://pupusebeleba.rf.gd/how_to_read_stock_market_index.pdfIn PDF document text
    • http://mowozikip.rf.gd/madewumupedoxofazulerim.pdfIn PDF document text
    • https://e082cb0d-9c22-4a21-acb7-e2c6127a51d3.filesusr.com/ugd/ff0c06_1fde53074a1648179f7be1a36f27bcd4.pdf?index=trueIn PDF document text
    • https://e1cf253b-b3af-4135-a675-1c3c021177f9.filesusr.com/ugd/111c46_9f9156f420b54ecc9e32c604cd25d232.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_off0000ef20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF20 5572 bytes
SHA-256: e6c869b14a90bd4570ddbf2579386c951126c9fc7f904924a78521e76a535d34
font_01_sfnt_off000101fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FD 10520 bytes
SHA-256: 17ed188f073fbaab133576b53d937b422ae9b9cf589ba3583b03b16a864415d8
font_02_sfnt_off000125fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125FD 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333