Malicious PDF — malware analysis report

Static analysis result for SHA-256 0190e9727623b744…

MALICIOUS

PDF

78.8 KB Created: 2021-04-30 04:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d582cb170785f4212d83a5283bc20829 SHA-1: 14713fc53c135c8e1a2689bbb0b9abfc09d3d072 SHA-256: 0190e9727623b744d6ad4f9574cbbd41ec29a006afbd5a3a848ea940aed45dea
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://bologen.ru/strik?utm_term=what+is+emphasis+in+art+and+design PDF link annotation
    • http://b4shop.icu/hbs_760_pairingk3ziw.pdfIn PDF document text
    • http://rasprodavaika.ru/linoranarawiw2xc4e.pdfIn PDF document text
    • http://dmdmassage.com/68428147520ivvll.pdfIn PDF document text
    • https://babujotiju.weebly.com/uploads/1/3/4/7/134751526/bebikakiresukalup.pdfIn PDF document text
    • https://ziziwatir.weebly.com/uploads/1/3/4/7/134713039/firewewupinum-tujaresikedixu-vikikijelib-pazadekeb.pdfIn PDF document text
    • https://mutabezikubi.weebly.com/uploads/1/3/4/7/134739743/be94866cbbb418.pdfIn PDF document text
    • https://vebusigatibata.weebly.com/uploads/1/3/4/3/134321359/d6ea37cf7cfba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/84386728714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d5c285a-d12c-4c4d-87f8-abc1fb2341d0/live_action_role-playing_game_participants.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21014f87-2aa3-4432-acd8-30c505f29412/can_you_refill_an_epson_ink_cartridge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fe81725-066b-4d6c-900d-e261f6790e87/vamemuvuworadul.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/glucosamine_chondroitin_powder_form.pdfIn PDF document text
    • https://3d73ec66-e24e-4607-99a5-aa3c333c10ea.filesusr.com/ugd/a96454_0307d4d13fae406691b3108b6b6f6aa0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kefodek/27909216974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f6c507e-26d4-4bab-b8e3-31c3a657fe87/6126540978.pdfIn PDF document text
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_fbe8af6a88c540bb9a6cfbffedfb8970.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e448f95b-f1f1-4bdc-b95b-f4934dcc70f0/16712261947.pdfIn PDF document text
    • https://2a0daf8d-7d8f-48a8-9da6-1f2c606fcb3a.filesusr.com/ugd/adb9e1_3d2dd531f3bd402cae1e7ebefcc03fa7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/77706266707.pdfIn PDF document text
    • https://fb7bf4c5-056f-4058-a7d1-073478569b53.filesusr.com/ugd/d90490_3df828a8e5df4dea8af97d88929be39a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/dajiwerol.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/hebrew_bible_with_strongs_numbers.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/riradawabamubobomajofewig.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/vajusojugolidogujuzizode.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B1 5356 bytes
SHA-256: 2f5e9834d864d041cbed004be68df3502c0ada718f436110bbb74e7f1ea3152c
font_01_sfnt_off000106c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C5 10736 bytes
SHA-256: fe235ac7097345acc78e95072eea6cbe42c87232c13064a6d38411dca510839c

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