Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cdb509ff0a53129…

MALICIOUS

PDF

268.0 KB Created: 2021-03-19 19:42:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: afe05a89ce77738714155fea291e819c SHA-1: 26335b0b7f9d0e0036455fe7dc8fa3e77f8efa05 SHA-256: 2cdb509ff0a5312993a32735556e4a5854f9e3cc9077697f06135bfe92ea0564
154 Risk Score

Malware Insights

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

The PDF contains embedded links pointing to known malicious redirector infrastructure, specifically 'https://yafferge.ru/award?keyword=retail+pharmacy+business+plan+sample+pdf'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and malicious links suggest an attempt to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://yafferge.ru/award?keyword=retail+pharmacy+business+plan+sample+pdf In PDF document text
    • https://basazujuw.weebly.com/uploads/1/3/5/3/135301233/jewubukidameda_xiponalula_pikevaki_betekipetuvapev.pdfIn PDF document text
    • https://fujemolubese.weebly.com/uploads/1/3/4/0/134012375/e0dd637ac2d41.pdfIn PDF document text
    • https://menajogatidufe.weebly.com/uploads/1/3/0/7/130740573/wugobimawog-bikekajeguke.pdfIn PDF document text
    • https://xavexipaw.weebly.com/uploads/1/3/1/6/131636683/7116471.pdfIn PDF document text
    • https://fegejakir.weebly.com/uploads/1/3/5/2/135299458/veliguduw-wuwofuxawew.pdfIn PDF document text
    • https://sefewazugep.weebly.com/uploads/1/3/5/2/135293251/3399611.pdfIn PDF document text
    • https://lemitixodage.weebly.com/uploads/1/3/4/8/134868200/9408540.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/Fjeicgf/21384735869.pdfIn PDF document text
    • https://zerorobasajegi.weebly.com/uploads/1/3/4/7/134751736/8945666.pdfIn PDF document text
    • https://cdn.sqhk.co/dafisuwikib/9yG3jaz/cube_surfer_appvn.pdfIn PDF document text
    • https://vefavufarexuba.weebly.com/uploads/1/3/4/3/134315694/genagi-zebixudegela-midori-dojudixetubarin.pdfIn PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/nelerigabop_xevazemipevawu_jebavelusenu_sisazuban.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cab1cbfe-5866-4acc-9ff3-d311656cde67/does_arbys_have_fish_sandwiches_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02c32f1f-a833-4cd3-8d95-ca8d579da398/garrett_ace_250_metal_detector_with_submersible_search_coil_plus_headphones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/597927d2-c568-4160-86bd-8740960121b3/jonumaxufuzusufatepanefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/494d69c6-1ea9-4a64-a9c5-1fb67aa9fa94/carto_de_credito_para_quem_tem_score_baixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/433bd692-0d2f-4e77-98b2-8a7d1b8dab51/pokmon_sword_and_shield_strategy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bbf8ff0-623d-4bc7-bcd3-5585dbdd0a74/zombie_parkour_game_xbox_one.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a180cde-62a2-4cd6-ac7f-bdb02ca4f3f7/fuwibiwekajev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f46d2dea-189c-42ab-a832-0e9c3df0f05d/how_to_reset_telstra_technicolor_modem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1543c93a-5125-4f88-ac10-a6d4bb756f31/58013013251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6878f49d-7d92-4f97-bf83-f1fccc3b6781/what_essential_oils_are_good_to_relieve_stress.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5fc7933-df85-4348-a6b5-4d21d9da9215/whirlpool_refrigerator_filter_3_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17d3eb1d-5daf-4fa0-a4c9-0134476256be/98129674128.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
stream_002_off00015cd7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15CD7 221996 bytes
SHA-256: afeb58e2fc363d57dd2d78ad2326ce385fe7ca78d96ec391bada07640ccac681
font_01_sfnt_off0003e6b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3E6B6 5644 bytes
SHA-256: cc95c82dd20634295c5ad14d41561abb99e8703eaaa9d38687ef423729e4bf0a
font_02_sfnt_off0003f9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F9C2 11308 bytes
SHA-256: 1187ee8fdab404aee1b0eed94934fba46486aae78caec634d21d719c8ef35ce3