Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed345a0913a07020…

MALICIOUS

PDF

78.0 KB Created: 2021-03-30 19:01:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d1a6c304f36ba3ccddc336166528c69c SHA-1: 0f8329b42ad65693e21300a182fc3ff407ed6564 SHA-256: ed345a0913a070204b9b33120cab865f958f93a6a0bf66eab5a8419adf4daa8a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified as a link farm. This suggests the document is designed to manipulate search engine rankings or to redirect users to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • 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://jumiwimov.ru/award?keyword=the+glass+mountain+donald+barthelme+pdf PDF link annotation
    • https://tugalebuwe.weebly.com/uploads/1/3/4/0/134012885/1880922.pdfIn PDF document text
    • https://gaburizopa.weebly.com/uploads/1/3/1/4/131438784/wowufoketira-zuruxadoxov-lemunadu-gitasij.pdfIn PDF document text
    • http://meetlait.pro/what_is_the_meaning_of_husna_in_arabichih4k.pdfIn PDF document text
    • https://woxogobigevi.weebly.com/uploads/1/3/0/8/130814596/kofuwuwes-baligexu.pdfIn PDF document text
    • https://retumitoratosu.weebly.com/uploads/1/3/4/2/134234586/zawunajixefajox_zipiveli_jimupa_lapasaxagosezur.pdfIn PDF document text
    • https://nuzazetoxulo.weebly.com/uploads/1/3/1/6/131636602/4685140.pdfIn PDF document text
    • https://walipovagotil.weebly.com/uploads/1/3/6/0/136016519/xopesides_gojikokuwinari_famajegikilorej_parivox.pdfIn PDF document text
    • http://betixisu.22web.org/vekijerogepekusezetokop.pdfIn PDF document text
    • https://revasarubon.weebly.com/uploads/1/3/5/2/135295272/xidodag-nazuv.pdfIn PDF document text
    • http://hydraruzxpnew4af.exchange/matilda_novel_main_charactersjcl5b.pdfIn PDF document text
    • https://vitojeji.weebly.com/uploads/1/3/1/4/131453493/89cb8dfd.pdfIn PDF document text
    • https://mogomanazeveka.weebly.com/uploads/1/3/0/9/130969503/eb7774.pdfIn PDF document text
    • http://1pokypki.website/coniugazione_verbo_assistere_forma_passivaswqt6.pdfIn PDF document text
    • https://lexezidelaxo.weebly.com/uploads/1/3/4/6/134605078/9175844.pdfIn PDF document text
    • https://rizidapovo.weebly.com/uploads/1/3/4/3/134316848/biwadejipus.pdfIn PDF document text
    • http://therarbooks.com/innocent_words_that_turn_her_onbo5kl.pdfIn PDF document text
    • http://life-news.tech/10523653893vgtiz.pdfIn PDF document text
    • https://mumerigowijegap.weebly.com/uploads/1/3/4/7/134771458/gurabeman_xukel_valubodasigi.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/numunenoji/83397806190.pdfIn PDF document text
    • http://wuwudejirogipux.rf.gd/antropologia_visual.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/phonetics_and_phonology_mcqs.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_off0000f2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F3 5544 bytes
SHA-256: 3c20224af420df2bbc30e90469f02ff24dd660afd69fdc52eb6034678420b2df
font_01_sfnt_off0001059a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059A 10708 bytes
SHA-256: aefef800874d3302c2368fcc1dd3f1f91115198f0ea0dcfdfdc7660ccbfbac11