Malicious PDF — malware analysis report

Static analysis result for SHA-256 28910f04cd5e637b…

MALICIOUS

PDF

34.6 KB Created: 2020-10-28 15:35:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: abebf0fd04190c84b0c6ed88220e4419 SHA-1: 10cab8ff4fe1d95f826e7960794061c8e11f1470 SHA-256: 28910f04cd5e637b5b898b318a4760dcf41d9541b11df49b666ebb82f6b8d259
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ggtraff.ru/aws?keyword=vidmate+download+apk+old+version In PDF document text
    • https://leputixoted.weebly.com/uploads/1/3/2/6/132683438/1856821.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/09427c23789b.pdfIn PDF document text
    • https://dawugagulinejud.weebly.com/uploads/1/3/4/3/134368664/bowemalelopag.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/a2089410.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/8123918.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/42346.pdfIn PDF document text
    • https://vedakevuvapi.weebly.com/uploads/1/3/4/0/134013486/bawuf-zerikon-gokabov.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/sojebelevenex/gumerevoxovowija.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/53495825845.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/3858688140.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/behold_our_god_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/bright_from_the_start_pre_k.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/rutefisevibibonotagudud.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/lifetime_folding_chairs_bjs.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/physiotherapy_exercises_for_cervical_spondylosis.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/3_week_yoga_retreat_reviews_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/labeled_blood_cells_under_microscope.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/dungeons_and_dragons_players_handbook.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/lobamegoka.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_off00004aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AFF 5288 bytes
SHA-256: e64c65af3607114ea27c6087e4c0f1915e8a44e9b0ddb77650c75726d52be815
font_01_sfnt_off00005cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF6 9396 bytes
SHA-256: e7c670b4e4de3decf8ae7f9f38dccda4eb533f6fe0fec37c9d2188a7d7f98cfa

Open this report in the interactive analyzer, or submit your own file for analysis.