Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b14d3dde2de5503…

MALICIOUS

PDF

87.3 KB Created: 2021-04-27 02:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 960bf46bff5c81bc7451cc5618cd2ecf SHA-1: b054f80cf234bc8d126903e4d8295cf0886d346c SHA-256: 9b14d3dde2de55037039679574ab691fa15587d1c2b18b1664de8eed14e6f7ab
196 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to an SEO redirector. The primary redirector URL is "https://resalured.ru/strik?utm_term=the+kingdom+of+god+is+in+you+bible+verse", which appears to be a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://resalured.ru/strik?utm_term=the+kingdom+of+god+is+in+you+bible+verse PDF link annotation
    • http://nituzovido.getenjoyment.net/azimute_topografia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_e99765c5e82f4f4dbf5d07937d696d6d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/fantastic_beasts_and_where_to_find_them_2_wikipedia.pdfIn PDF document text
    • https://c140f178-ee45-427e-91fe-a3c5f821f67e.filesusr.com/ugd/ebc5f9_eaf67bac39c84d35ae3384a146f4b31b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vosimalume/macbeth_act_4_summary_course_hero.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/command_and_conquer_ultimate_collection_digital.pdfIn PDF document text
    • https://39c3e2ba-dcb8-4bc0-9ed7-0058f02c59d5.filesusr.com/ugd/fd4c29_504c871b7c1d47a0b2148ec63e487023.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jusuberu/present_continuous_tense_easy_exercises.pdfIn PDF document text
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_aad64b4247434d25847ac9ef9a82aa0f.pdf?index=trueIn PDF document text
    • https://cb0508fd-2a1f-4901-a161-a76823ee8e4f.filesusr.com/ugd/52013e_f6c925f4ec314a24bc95dfd39026e3c5.pdf?index=trueIn PDF document text
    • https://f7690f66-1871-4559-97e0-239dee5b15da.filesusr.com/ugd/d2cc1f_8d4a833d07ab41169866c8444dcfbfea.pdf?index=trueIn PDF document text
    • https://0306adf0-382e-42f1-903d-71c3961c97f1.filesusr.com/ugd/7ff653_403467a054864dd795ee4fa65ae3e328.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xubifupi/raramakuka.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/90020539200.pdfIn PDF document text
    • https://cf268418-7549-4780-9cff-e39e61b5276c.filesusr.com/ugd/0b1cf2_a1b9342d1daa4ebdb25c80beaed436cc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jinabisura/49183478719.pdfIn PDF document text
    • http://dojorunubi.myartsonline.com/iata_aviation_security_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/operations_management_william_j_stevenson_14th_edition.pdfIn PDF document text
    • https://667abc8f-92ca-45d9-bc9d-789c80a68858.filesusr.com/ugd/dcd78f_1083980901504d0c903c90df05a597f9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/drug_information_handbook_for_dentistry_25th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/doburagukorize.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000131f6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x131F6 18088 bytes
SHA-256: 62d9e218a92e7105b2287febd8be4fce4afd0a5ecc16939b2b618b8265a24345
font_00_sfnt_off0000f948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF948 5428 bytes
SHA-256: 229c41a39b363a90a0ca92f9c02390b39d3e341ab3b612ddf2106824cfe3df47
font_01_sfnt_off00010ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA5 11208 bytes
SHA-256: 235bc7331c691e823a6c4d41a9e9f8982788dd16cf82d20f8544147c472167a8