Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1452302cb7f27a9…

MALICIOUS

PDF

97.7 KB Created: 2021-03-06 02:49:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 05a7919d6c99ad10c33b99afe4925a11 SHA-1: d697ea9167f59c74799bb5808fae83df828fc803 SHA-256: b1452302cb7f27a96546fb5740b709c29dcecfbb4882db8f718abd8648c9baef
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to improve search engine rankings, a common tactic for phishing and scam sites. The primary lure, 'Quest answer key 2019 physics', is presented alongside a redirector URL, suggesting an attempt to drive traffic to a malicious site. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://pelibifir.ru/wix?keyword=quest+answer+key+2019+physics PDF link annotation
    • https://fevufimekosiso.weebly.com/uploads/1/3/1/1/131164497/jajedovalasel-wepizukoxob.pdfIn PDF document text
    • http://zeboxagekej.sportsontheweb.net/how_to_hook_up_wireless_xbox_360_controller_to_pc_without_receiver.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/rumepos.pdfIn PDF document text
    • https://voberugupov.weebly.com/uploads/1/3/4/4/134496708/124127.pdfIn PDF document text
    • http://bokaxakoz.sportsontheweb.net/physics_textbook_class_12_state_board.pdfIn PDF document text
    • https://rixuxakixolewe.weebly.com/uploads/1/3/1/3/131380342/nuvozabobof-paxufisu-valopiw-rorivuwaviki.pdfIn PDF document text
    • http://ganitigusawev.mygamesonline.org/30091514854.pdfIn PDF document text
    • https://sixebujexe.weebly.com/uploads/1/3/0/7/130740217/roluvax.pdfIn PDF document text
    • http://jigatinapa.22web.org/escape_from_cannibal_farm_full_movie.pdfIn PDF document text
    • https://vorevowupi.weebly.com/uploads/1/3/4/6/134633589/nejakepov.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/human_anatomy_and_physiology_lab_manual_13th_edition_fetal_pig_ebook.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/how_to_tell_if_pilot_light_is_on_water_heater.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.thdl.org/http://www.thdl.org/TibetanIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/caida_del_muro_de_berlin_consecuencias.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/metasegokiwireladegoz.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/togebipoxivofamujorazapox.pdfIn PDF document text
    • http://wazinupizut.epizy.com/gumirabelu.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/wisafinukolu.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/69821436727.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/88770562873.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/44688716399.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/passport_canada_application_form_baby.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/logos_quiz_gouci_app_answers_level_18.pdfIn PDF document text
    • http://dexixikix.epizy.com/19516513528.pdfIn PDF document text
    • http://jafimogapevov.rf.gd/86160918626.pdfIn PDF document text
    • http://japinoxizidunub.myartsonline.com/vipuboze.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
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlTibetanIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001161d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161D 5788 bytes
SHA-256: 5e5e23da6ac38da7a453701a47b80c7fc3720ea6aa652de5489fd13e8151180c
font_01_sfnt_off000129f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F1 9008 bytes
SHA-256: 8cde9f0db56f1d3c26b797cc1e72475645a53424985cf20805e5529f03ae647e
font_02_sfnt_off00013bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BCA 11536 bytes
SHA-256: c160fd8da5046bb496efec3ff37ca6f792f4ee1c8e4d80871bd657b7cbf15ede
font_03_sfnt_off0001636c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1636C 16096 bytes
SHA-256: 3a87a2a80cb0740ff7ad33dbd9b35031d90241dfccc5ab96a3d2c3133af9c3ca

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