Malicious PDF — malware analysis report

Static analysis result for SHA-256 78abb6d529fc6a83…

MALICIOUS

PDF

75.6 KB Created: 2021-03-22 14:29:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 8195382a0b7a2f1cb67357deea8b8414 SHA-1: 8afd8b3728d63fba58554af65f3f3124b74a0d68 SHA-256: 78abb6d529fc6a835090a2215d9aa757748ac33f31ad6b3dfa4ce30b998c8e58
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The embedded document body text is heavily obfuscated and appears to be junk data, further indicating a malicious intent rather than legitimate content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9618

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://gimoguvi.ru/aws?utm_term=one-page+essay+about+your+personal+and+professional+accomplishments+since+graduation PDF link annotation
    • https://gafukarufigak.weebly.com/uploads/1/3/5/3/135309608/f94070483403e2f.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/dipivixudekoziriderejinum.pdfIn PDF document text
    • https://tazuwadafif.weebly.com/uploads/1/3/4/8/134857375/visopib-rinebexoput-fugipiwalir-bupufujata.pdfIn PDF document text
    • http://hurleyshamburgers.com/the_emerald_tablets_of_thothjslc9.pdfIn PDF document text
    • http://business-open.online/sapafarozajiwd52hg.pdfIn PDF document text
    • https://donefuvo.weebly.com/uploads/1/3/1/1/131164418/gedeteve-sedar.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/61068526554.pdfIn PDF document text
    • http://premial.su/what_is_the_best_beatles_song_latte_be_jokem38n3.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/famobobilazevaxuta.pdfIn PDF document text
    • http://netolenogafa.getenjoyment.net/biochemistry_of_cell.pdfIn PDF document text
    • http://dayzcommunity.info/hum_ko_man_ki_shakti_dena_shraddha_vizbu0.pdfIn PDF document text
    • https://xikematevi.weebly.com/uploads/1/3/4/3/134392378/2606161.pdfIn PDF document text
    • http://womenit.space/66531193492eiwqt.pdfIn PDF document text
    • https://gawufuxawejax.weebly.com/uploads/1/3/1/8/131855981/299254d4b1b4.pdfIn PDF document text
    • http://coloradocustomelectric.com/pubidibijezivoxatimowwlsii.pdfIn PDF document text
    • http://aazzzry.space/vixiravezazipasulovesadc4e0p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://992bddda-184d-467f-a815-0165b41a2208.filesusr.com/ugd/69695d_a24fa46678ac49a68fe7d331da46513d.pdf?index=trueIn PDF document text
    • http://totuxivez.onlinewebshop.net/dixie_chopper_blackhawk_60_inch.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/224391977.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/nfl_preseason_2019.pdfIn PDF document text
    • https://a44a9d9e-3ce9-422e-9b5d-83ef2d4925cb.filesusr.com/ugd/3234e9_0944850acca343249d60e75b2bf78adb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/48911690261.pdfIn PDF document text
    • https://1e26fe13-8dad-4692-90e9-a43e0a101904.filesusr.com/ugd/c345b0_ef596fe01c534a1bbd644886ccb6a24a.pdf?index=trueIn PDF document text
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_09871db1bbc647fc9f06d3d63c6beec3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bakoloj/mla_format_citing_online_article.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/sirokokovazilujokidusit.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A7 5872 bytes
SHA-256: daec085cff404df6d018541b272fe71284b7e6cdf693c5397aa901d2274a5418

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