Malicious PDF — malware analysis report

Static analysis result for SHA-256 111bd151f4a50d34…

MALICIOUS

PDF

80.1 KB Created: 2021-03-05 02:08:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 84629eea37cdc7a0853c74fdb3406ad4 SHA-1: 1249117e1e2b421428b01a070d7a59e6ba71feca SHA-256: 111bd151f4a50d349de55feb9640ce0846113df40c3826416f84ee30de2a6d0b
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 domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external 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-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://jottigo.ru/award?keyword=concept+of+social+contract+definition PDF link annotation
    • http://raxejudesezix.scienceontheweb.net/vurenura.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366364/normal_5fff68a1d6ab3.pdfIn PDF document text
    • http://itasda.online/unix_shell_scripting_resumebuof1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384149/normal_602198e8dff2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495846/normal_600eb0d698563.pdfIn PDF document text
    • http://easycreditscore.info/991266580526cj5q.pdfIn PDF document text
    • http://zugasanuko.getenjoyment.net/whats_the_difference_between_joy_and_happiness_in_the_bible.pdfIn PDF document text
    • http://zukirudon.mypressonline.com/how_to_cope_with_bpd_mother.pdfIn PDF document text
    • http://biomanix.best/muvebaxilibajazani6xqcy.pdfIn PDF document text
    • https://wamonudikiso.weebly.com/uploads/1/3/0/7/130776885/fagibatodox.pdfIn PDF document text
    • https://mibaxezaju.weebly.com/uploads/1/3/4/6/134641270/de3e8eea2b0e.pdfIn PDF document text
    • https://ponegibafuzixi.weebly.com/uploads/1/3/1/4/131406662/moloreneratuzovi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478415/normal_5fc7521cb7d9b.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://uploads.strikinglycdn.com/files/1e6d57da-2e08-43ed-b78a-8925bded0afc/how_to_restore_ipod_nano_1st_generation_without_itunes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58b7c451-b73b-4dc9-96a9-67cd9584d3ca/onan_4.0_rv_genset_manual.pdfIn PDF document text
    • http://mubodadekutaxim.atwebpages.com/how_do_you_convert_fractions_into_decimals_without_a_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0452a525-b74c-4e89-af41-de41d9ce674a/99949567904.pdfIn PDF document text
    • http://luxupuxud.myartsonline.com/58108703117.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc9d72ba-9814-4110-a5d6-74c7563f0615/xuvijig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c26b95c-b53b-43c0-86bb-2162636bc0ec/bixadokojegolimet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9958fd4-6041-42bf-b7f6-04d63a2be490/joreb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c96ef0d9-44c3-4ba7-9ac5-df16706d486a/what_three_things_do_plants_need_for_photosynthesis_and_how_does_a_vascular_plant_get_these_things.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fba687f5-7447-4b50-907e-3ad7d5976b0d/sentence_of_weekend_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8281dcc4-a016-4491-8642-86e5786e89f4/safety_rules_at_home_for_4_year_old.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d518c082-3e70-4128-a56b-fe7f2e833964/small_appliance_repair_shops_near_me.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f06f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06F 4960 bytes
SHA-256: eedc0e60adcab1e79a112c06ddab81aae73bad6f4e2be6402148d124dfd15cda
font_01_sfnt_off00010156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10156 10392 bytes
SHA-256: f690c09e18000ce71ca79b2694732f92912f2a1a1d108c7157d7c740b98fea3a
font_02_sfnt_off000124c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C3 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361