Malicious PDF — malware analysis report

Static analysis result for SHA-256 495fb034a1ef6c13…

MALICIOUS

PDF

59.0 KB Created: 2020-10-15 03:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 51aab07e369c0fc5076e08efcd003e79 SHA-1: 2400e31443b13ae38061971238da51cec4125b4e SHA-256: 495fb034a1ef6c138a5ed11f338a2933bdc8060e9ff882ea7ef182396566f83a
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?keyword=stihl+ms+180+chainsaw+manual In PDF document text
    • https://site-1040178.mozfiles.com/files/1040178/29864378338.pdfIn PDF document text
    • https://site-1036936.mozfiles.com/files/1036936/76563995498.pdfIn PDF document text
    • https://site-1041076.mozfiles.com/files/1041076/kifusepab.pdfIn PDF document text
    • https://site-1039489.mozfiles.com/files/1039489/50295049006.pdfIn PDF document text
    • https://site-1040180.mozfiles.com/files/1040180/zotalewezimojodoj.pdfIn PDF document text
    • https://punadojum.weebly.com/uploads/1/3/2/6/132680976/2816456.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/37288358.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://cdn.shopify.com/s/files/1/0497/1977/1297/files/how_to_remove_broken_light_bulb_from_high_ceiling.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2578/3190/files/nova_launcher_beta_apkpure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2028/7639/files/solapur_university_question_paper_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4827/9449/files/biotechnology_lab_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7105/2703/files/36792762460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2dd59fe-91fe-4c33-9048-b98b3bf1691e/lusux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b77f214-044a-4782-9bb7-1a32ebe94447/85655947516.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6327/9255/files/time_set_permission_minecraft.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9209/0788/files/the_bible_as_history_werner_keller.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/6276/3160/files/nigudinoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4376/3862/files/44086507750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0649/8728/files/76312922944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8930/0130/files/63335579617.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2174/5822/files/bupaxerazovagoxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1184/1459/files/2020_saturn_vue_manual_transmission_fluid_check.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_off00009b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B62 5180 bytes
SHA-256: fcff7ba0cb165250c1bef271208414d5fd92e553ccb27bfb46a6f2681196fc1b
font_01_sfnt_off0000ace2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACE2 10336 bytes
SHA-256: 9c79e6a78fad4db1d6a39f47f4d507eee92e1158ebb91cbc60be3bdf8aa17021
font_02_sfnt_off0000d04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD04A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f